Should I have yet .... ?

I really understand your situation, your dilemma, but you are young. If this were a boyfriend, a relationship which is building, strengthening, that's another story, there would be commitment, love, etc. But in this situation you would be having with someone who is moving away, on to greener pastures. Yes, you might have a great time time with him but just because he's experienced doesn't guarantee that it would be wonderful for you if it's your first time. Honey, don't waste losing your virginity, (with the added risk of pregnancy, STD's and AIDS) on someone who is leaving and who will have no responsibility. The emotional burden on you would be very very heavy. Don't get coaxed into something like this because of your attraction to him. I understand this is someone you care for and he does for you, but you don't have to have with a person you're attracted to. If this is someone who is meant to be in your life, in a loving and romantic way, then you will hook up in the future.