My boyfriend is moving and he wants to have sex.

My boyfriend is moving away in august and he said he still wants to have sex. It would be my first time and I'm scared. We have done other sexual things, but sometimes I feel like that's all he wants. That all he wants is sex and then he can just leave and never think about me again. He is a good guy and I love him I just don't know what I want. Do u ladies think I should do it with him? Or should I wait.