Feeling isolated, different, sad and completely lost?

[Joel]

So I don't have a bf or gf, I don't feel like any of my friends are very close or genuine, I don't feel like I have a certain group or anything that I fit into in school. I'm 16 and I feel like my life and teen years are passing with no real meaning or happenings. I look at the popular kids on Facebook and they all seem to have amazing, fun, grown up lives. I feel like my life is a lonely failure that no one cares about. I always try to tell myself to be happier and look on the brightside, but I seem to be surrounded by confident and happy people who have ir all together and are popular and attractive and interesting etc and it makes me feel so desperately sad and lost. Help me?