I didn't vote because I didn't know what answer to vote for....just have some thoughts though:

You are young....there are many reasons he may have chosen to break up while still treating you nice.....some people just treat everyone nicely but it's not a sign of a close relationship.....they just care about people.

I'm sure he had a logical reason in his own mind for breaking up whatever that reason was. It hurts being on the receiving end of it....but at 17 you have a lot of life ahead & dating guys give you a much better view of what you really want in the person you will want to settle down with & it gives you a chance to learn what red flags exist that you want to stay away from. Look at it as a chance to continue your growth.

I had a long distance relationship my senior year of High School (when I was 17). I ended up allowing it to limit my having someone who was right there in my life......then that summer I got a Dear John letter letting me know that me met a girl & was getting married......at that point I realized that I was never going to let any guy control my life & that getting my degree & having a career needed to be my primary goal in life because that was in reality the only way I could be in control of my own life.

Life can be complex.....when you find the right person, it may become more obvious.....I ended up after a lot of dating still getting married to the wrong person because I stupidly didn't listen to the red flags that were flying & letting me know it was wrong & I even tried to make sure our values were the same....but he lied & didn't have the ability to communicate what his thoughts really were.

If the relationship had been right for both of you, you would still be in it but you can't force something to be when it's NOT RIGHT for both.