Oral Sex

I'm 18, and so is my boyfriend. We're both very inexperienced, as we have only ever been with each other (not sexually yet), but he and I have been itching to get our hands on each other, haven't seen him in 3 months... which sucks... but he and I have been "dirty talking" and he says the next time we're together, he wants to try to get me to orgasm. I love the idea, but I'm worried he won't be able to... no one, other than myself, has ever tried and I'm worried he'll be disappointed if he can't... any tips?