I only have a couple words of advice. The first relates to people using you. I have been in this spot before and I just want to say you have to stand up for yourself and push back a little. If you feel people are taking advantage of you tell them to back off. Set healthy boundaries. Don't say yes to everything and everyone. Let yourself be selfish every once and a while. People that don't say now or speak up get walked on because other people think you are fine with it. Remember it is ok to say no to someone.

The other advise is that being 17 and trying to find love is confusing. People make judgements and classify each other in a way that just doesnt extend much beyone school. Dating becomes a lot more fulfilling when you are done with high school. By then you are in college and gaining independance and figuring yourself out, as well as you are able to make choices on your own without needing to clear things with parents. Also the space from your own apartment, dorm or wherever you choose to live gives you the space and freedom to develop a more meaningful releationship. Things may suck for you right now, and you may feel like you wasted time and hopes on a girl, but it is a short amount of time and effort compared to the rest of your life. Keep your head up and things will work out for you.