I noticed that you have a lot of feelings, just from reading your post you feel left out, lonely, helpless, missing out, etc… First I would ask you if you are a sensitive person and recommend you do some research on people who are sensitive. People who are sensitive usually do not like a lot of stimuli and have anxiety. Maybe the party scene is too much for you, it really isn’t for everyone and as others said you will find new better social environments as you grow up. It is difficult to find good friends, especially for a sensitive person if you are, because sensitive people are also more sensitive to negative social cues and criticism, so even if someone is being nice to you, do you pick up the negative facial expression that flashes across there face for a split second. Hope this helps.