Sex with my boyfriend

Okay so me and my boyfriend have been going out nearly 4 years now and I love him more than anything in the entire world. I love having sex with him and I am generally a very horny person but the only thing is he has only made me orgasm a handful of times, I can orgasm quite quickly when we are having sex and I touch myself also but when he tries to do the same it just never feels as good. He thinks I orgasm most of the time we had sex and recently he said 'if i couldn't make you orgasm I wouldn't even want to have sex anymore I would be so ashamed' I don't know what to do or say, I just want a better sex life and to orgasm freely from my boyfriend alone? Please help?