I've never had an orgasm with my boyfriend

I don't know what's wrong with me. seriously. my boyfriend and i have been together about 3 years (2 of them long distance) and I've never been able to have an orgasm with him. I'm ridiculously attracted to him, and everything he does feels really good, but I just never seem to get close. The only times I've ever been able to orgasm on my own are using a vibrator. My own fingers don't do anything for me and while his feel really good it just doesn't get me there, same with being eaten out (even if it's for like 10-15 min). I'm embarrassed and I feel like there's something wrong with me. We're both 18 and were eachother's firsts. Sometimes while we're having sex it'll start to feel really good but I just don't get close, I have no idea why. He cums almost every time whenever we do something, so idk what my problem is. Please help ☹️ I love him more than anything so I don't know what the issue is