can't come from head?

I have no problem getting myself to orgasm, either by vibrator or manually. It takes less than two minutes every time lol. getting head has always been something i fantasized about and thought was so hot, but the first time i got it nothing really happened. I mean, it felt good but it wasn't mind blowing. my boyfriend is now beating himself up over it, because no matter what we do, i can't orgasm. I require a lot of pressure to orgasm when i'm by myself, is it possible that his mouth just isnt enough? but when he rubs my clit i still can't. idk what to do :( sorry for the tmi lol