It took me years to realise how narcissistic behaviour in men affects your mental health over time. At least, that’s what I tell myself now. Because when I look back at the earliest signs of narcissistic abuse in my relationship, it honestly didn’t feel like a big deal. In fact, it didn’t even feel like anything at all at first.

Sure, there were incidents here and there. Offhand comments. Silent treatments. Times when I felt like he wasn’t really hearing me. But who doesn’t fight, right? If you’ve ever been with a narcissist (or a man who exhibits narcissistic behaviors ), you know what I’m talking about—how it slowly eats away at you until you don’t even realize you feel less like yourself anymore.

What Narcissistic Behaviour Actually Looks Like

To start, let’s get clear on what narcissistic behavior looks like because men can be narcissistic without it being super obvious. Here are some of the most common signs you’re dealing with a narcissist:

He makes every conversation about himself
He can’t show empathy when you’re upset
He refuses to accept responsibility for anything
He makes you feel like your feelings are “too much”
He one-ups you or competes with you instead of supporting you

Yup. It all sucks. But more importantly, it all affects you over time.

Here’s how…

1. Your Self-Esteem Starts to Crack

The first place you’ll notice a change is in how you feel about yourself.

He might:

Ignore your opinions
Find faults in everything you do
Rarely (or never) compliment you
Constantly put you down—even if it’s disguised as a joke

At first, these comments might roll off your back.

But the more you hear them, the more you start to believe them.

And soon, you might find yourself thinking the following:

“I am too sensitive.”
“I always overreact.”
“I should try harder.”

See what I mean?

Your confidence starts to shrink.

2. You Constantly Feel on Edge

The second way narcissistic behavior affects you over time is through anxiety.

It starts small…

Maybe he goes hot and cold.
Maybe he has mood swings.
Maybe he emotionally withdraws when he’s stressed.

Whatever it is, you’re on high alert all the time.

Rewrite everything you say so you don’t set him off.
Analysing every text or message you send.
Staying hyper-aware during moments that should feel relaxing.

And just like the first point, your mind and body don’t notice it at first—you simply adapt.

Until…

You realise you’re the only one putting in effort.

Sound familiar?

This is where exhaustion sets in.

3. You Feel Emotionally Exhausted and Burned Out

If someone is taking more from the relationship than they’re giving, someone has to compensate.

And nine times out of ten, it’s you.

You give your time, energy, and affection while doing the following:

Trying to have difficult conversations
Trying to “fix” the relationship
Trying to maintain emotional balance

Meanwhile, he:

Avoids uncomfortable topics
Blames you when things go wrong
Expects you to meet his needs and expectations

Until one day, you wake up tired.

Not just physically, but deeply, emotionally drained.

Because pouring into someone else while your own cup stays empty is exhausting.

4. You Feel Confused Because of Gaslighting

Gaslighting is a common tactic used by narcissists.

“It didn’t happen that way.”
“You’re too sensitive.”
“You’re imagining things.”

At first, you might brush it off. Everyone argues, right?

Maybe you misunderstood?

But what happens when it keeps happening?

When he repeatedly makes you question your own reality?

You start to believe him.

Your thoughts become foggy with confusion.

“Should I trust how I feel?”
“Am I overreacting?”
“Maybe I am the problem.”

This type of manipulation is extremely harmful.

Because the moment you stop trusting yourself, the relationship becomes unstable at its core.

5. You Lose Yourself

One of the most painful side effects of being with a narcissist is losing your identity.

It happens slowly.

You start by censoring the following:

What you say
What do you talk about
How you react

And over time, you lose even more of yourself:

Speaking up feels scary
Expressing your needs feels risky
You constantly prioritize his feelings over your own

Eventually, you become someone you don’t even recognise.

Someone who no longer shows up as their full self.

Why It’s So Hard to See These Signs Early On

The hardest part?

Abusive relationships don’t start out abusive.

They usually begin with:

“Wow, he’s giving me so much attention.”
“It feels like he really understands me.”
“He’s so kind and thoughtful.”

In fact, it often starts out amazing.

Which is exactly why it’s so hard to accept when things change.

“I thought he used to listen to me.”
“He didn’t act like this before.”
“This isn’t the same person I fell in love with.”

The truth?

He is the same person.

The behavior r just became more visible over time.

How to Break the Cycle and Find Yourself Again

The scary part about recognizing sing narcissistic behavior our is realizing how deeply it can affect you.

But the good news? You can heal.

Here’s where to start:

1. Learn to Trust Your Feelings Again

Your feelings are valid. If something feels off, it probably is.

2. Rebuild Your Self-Esteem

Reconnect with who you were before the relationship. You are not defined by how someone treated you.

3. Set Firm Boundaries

Inconsistent people make promises they don’t keep. Boundaries protect your peace.

4. Talk to Someone

A trusted friend or therapist can help you process your emotions and gain clarity.

You don’t have to figure this out alone.

5. Take Your Power Back

You deserve respect, care, and emotional safety in your relationships. Always.

Signs Your Mental Health Is Being Affected

Still unsure? Look for these signs:

You feel anxious or tense most of the time
You question your thoughts and feelings
You feel emotionally drained
You’ve lost confidence in yourself
You don’t recognize yourself anymore

If this resonates with you, know this:

You are not alone—and you deserve better.

Closing Thoughts

I know this was a long post, but I hope it helped you understand how narcissistic behaviour affects your mental health over time. Because the hardest part about narcissistic abuse is that it doesn’t always feel like abuse. It’s the small, everyday moments that slowly wear you down.

But once you know better, you can do better.

You can spot the signs earlier.
You can rebuild your confidence.
You can trust yourself again.

And most importantly…

You can finally feel like you again.

Whole. Grounded. And emotionally safe.

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Benjamin Otu Effiwatt

Benjamin Otu Effiwatt is the founder of Love With Standard, where he helps readers navigate modern relationships with clarity, self-worth, and emotional intelligence. Through deep research and real-life insight, he breaks down toxic patterns and narcissistic behaviors into practical guidance that empowers people to set boundaries, recognize red flags, and choose healthier love.

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