getting fingered for the first time?

okay so my boyfriend and I have been dating for 7 months now. He's a Marine and is away from home right now. We were FaceTiming last night and things got a little freaky and he says that next time he sees me, he wants to finger me. He's eaten me out before but never has fingered me. I'm 19 and he's 18. I'm a virgin so i'm worried i'll bleed or it'll hurt. I want him to do it but i'm nervous! Any tips or advice would be much appreciated! Thanks in advanced.