itsonlyme,
Are you in Yeshiva? If yes, please realize that these teen situations do happen. Don’t tail someone who you want to be your friend. That will only give that person a very bad taste of you. I understand how you feel; you spilled yourself out to him and now he’s running away with your secrets. Over time, as you both mature, you may become friends again, albeit probably not with the same secret-sharing closeness.
Try getting other friends, but not by nagging or tailing. Be friendly to people. Be cautious, too. Don’t divulge anything that you don’t want getting out. As they say, “love many, trust few.”
You will get over this. Be patient and try to pick yourself up and be someone on your own. Try to have more than one friend. They don’t have to be best-best friends, but keep up with several people. That is an insurance plan for always having a friend.