HELP, I want an orgasm too!!!

Sooo I lost my virginity to a guy who wasn't all that experienced when it came to sex. He had only done one position with his ex and gotten head for a few minutes. Its been 2 months and we have sex every time we go out and now I've become more comfortable with it and learned more about his body and how to make him cum. We've both tried all kinds of new positions and fucked in so many random places, we just have a lot of fun together. I give him AT LEAST 3 orgasms a day when we see each other buuuut, he has not made me cum once since we started having sex. I can't blame it all on him because he really does try hard sometimes, he takes his time playing with my clit and fingering me and he'll fuck me in the same position for as long as I tell him too, but it just doesnt work. I stimulate my clit during sex and it feels good but I just can't focus enough to reach orgasm. Its sooo frustrating I have no idea why I can't cum no matter how hard I try. I just feel like I can't relax enough or something. I have never orgasmed in front of anyone else so maybe I'm just too nervous but I want to be able to eventually. Pleaseeee give me some advice or tips or anything to help me to be able to orgasm during sex