Just want to get some kind of dignity back

[Animallover990]

To cut a long story short, I’ve been on the receiving end of who I strongly suspect is a narc-married guy who led me up the green path for the last six months. I started getting hurt and telling him I’d developed feelings and need space. Well all night last night he just spoke to me with such a huge grin on his face and I feel rotten, he spoke to me for five hours yesterday and stupid me went home on cloud false 9 thinking he’s in love with me, then I spend the day feeling sick and he tells me later he spent the day with his SO out somewhere. I’ve never felt like such a pathetic alone piece of shit in my entire life, whilst at the same time he’s just had his ego fed. I can’t do this anymore, when he told me about how he spent his day today whilst I was just in bed wondering why he hadn’t been online. I just need some kind of way to get my dignity back

What did he say when you asked why he'd never mentioned he has a significant other?

You're the side piece to a lying unfaithful man. What did you expect?

How you get your dignity back is to either go NC with him, or absolute minimum contact.

Then go out and do things you enjoy, try to meet people, try to date etc.

Fill your every spare hour.

You will detach and recover.

But you need NC or very very low contact with him for it to happen.

And in future, if they're married ..... Don't even engage. No matter what their behaviour is like.

If they're unhappily married and not committed - they can separate.

Until they have done that, they're very much married.

Anyway - you could be in a worse position...you could be his wife. Married to a man who acts inappropriately towards other women for attention, gratification, ego etc.
He even does it when they've told him they've caught feelings and need space.

That's not a faithful man, whether he ever does anything physical or not.
That's not a decent man either.

You get your dignity back by blocking him and moving on with your life.

Ah, we've all been there OP. All a lesson in life.

Dump him and move on. Pity the poor wife or girlfriend instead.

Don’t go out with someone who already has a partner

She never said she's gone out with him.

It sounds like they work together or similar.