Is it ok and
Shouldn’t I be happy
There are no shoulds. Unless you break a law, everything is ok. You are looking to be externally guided on how you 'should' feel, and punishing yourself when you think you haven't 'fit the bill', but there's no bill to fit. There is no requirement on you to be happy. If there was, where would that come from? Who would be requiring it?
Your responsibility in life is to make your life the way you want it. You can't have everything you want, just like the rest of us. I wasn't able to have kids either, so we have that in common. Some of my friends are wildly more successful and rich than me. I'd like that for myself, but for the effort I put in? Likely I'll have to accept being on a lower rung. Life has a lot of disappointments in it, for everybody.
I can tell you what feelings are for: they are the real you explaining to you precisely what you need. And the real you, just like the real me and the real everybody else, is about 4 years old. In a healthy mindset, we listen to the 4 year old, who is quite possibly being completely irrational and wanting to own a rainbow or something (you know 4 year olds), and we do what we can to make it feel better. So, if something inside me started to get pissed off because I didn't own a rainbow, I'd say (internally) 'OK, well, that's not something that can actually happen, but, how about we find lots of pictures of rainbows, and get a mini projector, and then project a rainbow onto the living room wall with it, from the laptop?'
If something inside you starts to get pissed off because you don't own a rainbow, you'll say (internally) 'Shut up, you little pest, you're really getting on my nerves. You've been in the way all day and now you're just demanding a pile of shit nonsense.'
Can you see the difference? Nothing has happened. No rainbows have been projected or dismissed. But my irrational child inside feels heard and loved and considered and respected. Yours feels like you do today. And that's why you feel like you do today; because that's how you speak to yourself.
I really do wish you a rainbow. I used to be where you are. It's horrible, but honestly, it's up to you to walk away from it. Nobody else. Nobody being proud of you. This is all you, now. You're an angry resentful child because of this
feelings just constantly get in the way
Your feelings are your heart. Nobody has ever listened to her or respected her. You're saying she's simply in the way. No wonder she's pissed off and hardened and having a tantrum at every tiny trigger.
Can't you be nicer to her? When I started doing this (by writing things down, which allowed me to express them without bothering anybody) my heart/feelings/inner 4 year old calmed down quite quickly. Where previously she would have said 'NONONONONOOOOOO!!!! AAARRRGGGHHHH!!!' in a difficult situation, she now knows that she will be heard, so there's no need to shout. She says things like 'Er, don't you think we should leave? It's pretty horrible here' and I listen. She has become my boundaries.
That's what your fury is: it's boundaries gone mad, due to being ignored. Start to listen. That's what 'self respect' means. Listening to and responding harmoniously with your feelings.