Aight girl, I just wanted to offere u a few friendly words. I totally respect how you feel but keep this in mind: You are a woman and he has not even reached adult-hood yet. The two of you probably have a totally different frame of mind on the whole relationship aspect. Think about it this way: Say you do act... then what next? Do you plan a seriously commitment with this high school student? He still has a few years left of high school where as you've probably graduated from college. You were once in HS so think about high school relationships... chances are he still wants to have fun and freedom to experience different girls until he finds where he is most comfortable, just like many of us did. Perhaps that's even all you want to do is have fun. Or maybe its possible in his case that he's ready to mature and knows where he is comfortable, but seriously how common is that in a 17 year old male? Think about it baby-girl. Unless you are making marriage a factor at your age, what you are looking for in a relationship is probably something completely different than what he is looking for. I am not going to tell you whether you should go for it or not, only offer advice and things to consider in your situation. As far as the 17-yr-old guy goes, I will not judge him because he probably is a great guy if you are best friends and interested in eachother, but I will remind you that there are PLENTY of MEN your age that will satisfy you, believe me! You seem like a smart girl so don't ever sell your self for less!
Now here comes the "If I were you" part... I would just straight up be honest with him. Since you two have obviously talked and established your feelings for eachother, establish where a relationship with you two would stand. And then from there, make your own decision! Don't let us tell you what to do.. only you know what you want. I hope all of our advice has helped! It sounds like everyone really cares and is really trying to help you out.