Im scared to be truly happy because I think all the time that something bad will happen and destroy my happiness

Does anyone else experience this lingering fear and anxiety because they think they’re capable of hurting someone? It’s killing me. I feel like I’m such a danger. I feel like I’m a predator. I feel like this awful person and I can’t shake it. I want to carry on with my day but I can’t. I don’t feel like I deserve it. I feel like I’ve done awful things. I can’t stop crying.

i feel so bad for posting here, idk what i wamt i have so many thoughts abt the feelings i have for my bf im scared my thughts are true or that they will be true and i feel bad for feeling amd thinking this way i such a bad girlfriend, i am scared that i like other people just because i look at them or talk to them normally and i feel like a liar what cam i do to stop feeling like this i am scared

I have had multiple experiences where I was too clingy or literally cried when someone i have known for 3 days stops talking to me. I have fixated on the idea that I am never going to be in a happy relationship so anytime someone is nice to me I hold my breath hoping we will fall in love and get married, even if don't know eachother. I find myself over looking qualities that I usually would not like and constantly seeking their validation.