Orgasm ?? :0

When we have sex, he is so kind and gentle. 🙊 Although rough when he needs to be. ;) Everything is good except If I start to feel too built up with something I get scared and try to push him off. I've never had a orgasm, and when we have sex and I start to feel overwhealmed I can't stand it. I haven't felt anything like it and I'm scared of what follows. He tries to comfort me, and explains he would love it if I would just let him. I think it injures his pride that we've been together for 5 months and hasn't given me an orgasm.