Can we be platonic friends after hooking up so soon?

Have a little more confidence. He didn't reject you; he just doesn't want to come across as a creep that's only after regardless of the damage he causes. He's smart enough to know that he doesn't want to be serious with anyone, and careful enough to know that losing your virginity is 'special' to you. You might end up losing it to him in the future, and he seems nice enough to care about your feelings. There's no reason why you can't have and still be friends.