Help orgasm question...

So I've been with my amazing boyfriend for 2 years now and we have been sleeping together for about a year and a half! I love him so so much and he pleases me really well but I've never had an orgasm! I've tired everything!!! But I still can't do it, I've never had an orgasm on my own either so now I'm starting to feel as though there is something wrong with me! Any advice people? Thank you :)