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

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

My rocd is making me disconected from my boyfriend thinking he is cringe and that i dont know him or i dont like him for real, making me question the times i was happy thinking i was pretending and i was just thinking i am happy and in love but i wasnt… when i think abt my boyfriend i cant feel happiness… im scared. Yesterday we talked he said he is happy when we talked he sais how happy he is and that if i dont feel the same i should not panic (hw knows about my thoughts) i am so sad, i dont want to be like this forever, im 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.