please help

Kaylee
So I've been with my boyfriend for almost 2 years. And we've been having sex for about a year, and I love having sex with him, it feels great and I love making him cum, but I have never orgasmed. I'm really starting to think I just can't do it but I don't know.... please help, anyone else with this problems? And tips or things to try to greater my chance of orgasm?