Please help. I have no friends?

[Piglet]

I'm a 16 year old girl. I go to an Online school just because it earlier for my family. Im going into my junior year of high school and im noticing how much better other people that I know, social lives are awesome. I go on Facebook or twitter and I see all these pictures and status of the them hanging out with their friends every weekend, parting and such and I feel like I totally missed out on it. I do have 2 or 3 friends that I hang out with everyonce in a blue moon but not a best friend and no one that I hang out with every weekend. I go to a youth group at my church, I just started a new job, I go to a air force type program for teens and I also play the violin and piano. So it's not like I have no where to meet people. The thing is I just can't get close with people I can never break down that barrier between talking and joking when we see eachother, to actually hanging out. I have never minded being sort of a loner I mean I'm with my family a lot and I talk to them so it doesn't bug me but I feel like I'm not a normal teen. Everyone is at parties on friday nights not at home watching a movie with their family. I feel like a complete loser. The upcoming school year I'm starting a vo tech school hopefully I can make friends there but idk what to do anymore. Please help