I am a little concerned about his being younger? Once you turn 18, you are an adult, and he could still be a minor? It just seems like there is a stigma, senior girl, sophomore guy, and I would hate to see this negatively affect your last year of high school. I am all for going against social norms, but this might not be the time or place. So he might have liked you back then, but things are just different now. You're an "older woman", and that could be a bigger problem than you are realizing? I could be way off, though.