Teenage mental health

I am a 17 year old girl who is home-schooled and I have no friends, except my mom's acquaintances. I am severely depressed because I have no friends and do not do anything social, except going to amateur orchestras for all ages, which is not that fun, especially since 99.1% of the group are 40+ so that leaves me out of the loop of making friends. What should I do besides going into youth orchestras, because this whole orchestra thing was all my father's plans and not mine, which i really do not like. Is there a support group out there? I am in need of teenage help in trying to keep my sanity. The good news is that I will be done this December with high school. Then there were two guys I took interest in already rejected me so that depressed me for a while. I mainly sit in my room most of the time surfing the internet or working. I took up a job, except I left because it did not go that well.