Nobody can answer this for you.
Whatever you decide, sex is serious and, in this case, an expression of love...it isn't a game; you shouldn't bet on it or use it as a lever.
If this is more than a casual relationship, you got to work it out. Seeing each other on weekends isn't bad. Plus there are holidays, breaks, summer vacation etc.
Study hard! Your future is important.

Okay Young lady,
I say that because I'm a 40 year diva woman 'smiles', been there done that.
My 'Q' to you is,
"Who initiated the bet, you or him? Reason being, not to make you insecure as I hope your relationship is with your boyfriend is secure. You are concerned because you want to be intimate with him like your used too before leaving but is he concerned about it too? If not maybe he's confident about winning because he's going to or is getting it from somewere else? Hum??? Could be wrong but don't waste your time on meaningless wagers! Have sex BUT be CAREFUL! Protect yourself always and don't take forgranted that you are the only one. You are sooo young, your still a baby!
Take care,
Robbie

I think it's sad that you gave your virginity to someone wou are now making bets with regarding sexual activity.

Ak your boyfriend to make you cllmax before intercourse. This can be done orally or with his fingers. For a twist maybe you can introduce some toys into the relationship. this way you cum and then you will be satisfied before he even enters you. who knows...maybe his problem is psycological and by you cumming first he will last longer and even pleasure you a second time before he unloads. Just some thoughts.