So this is rock bottom.. no friends?!?

I've never felt this way before. I know some people have it worse but seriously I feel so sad right now. the feeling has been welling up inside me for a few months now.. all starting when these two really great friends I had made at school decided they didn't want to be friends with me, the reason being that I was too "clingy" and that they wanted to expand. They claimed they still wanted to be friends, but I knew they were just trying to spare my feelings and not flat out reject me. For the past couple months I have been a loner at school. Ever since they dumped me I've had no confidence and it seems impossible to make friends. I have no one there to talk too anymore. Just now I had a conversation with one of these girls online and in a very condescending manner stated that she had branched out and so should I. I have had hope throughout these months that my friendship with these two girls would have been rekindled, but this conversation just crushed all hope. I was kind of like an official break up. Im so sad. Where do I go from here? Honestly, when I'm comfortable in a situation I'm a very funny, likeable person. I'm nice and I care about people. But now I have no confidence at school and feel awkward and pathetic all the time. I'm a sopre, and each day of school is torture because everyone is with their friends and I'm alone. Any advice on how to get over this and regain my confidence? Or how to make friends?