Is it time for me to get help?

In the past 2 years I've lost almost all my friends. All I do now is watch tv go to classes and bodybuilding 6 days a week. I haven't had a girlfriend in 3 years except random hookups here and there. I'm currently in the longest loneliest stretch yet. My isolation is causing me to get progressively worse anxiety and social skills. I've never experienced anxiety or lack of confidence like this before.
I used to be a very popular kid with lots of friends and a really good social life I had lots of confidence with friends, strangers, and peers in social settings. Now I am pathetic, it's like I'm not the same person and I think people think I've gone insane..

Idk whats wrong with me, but I think I've developed social anxiety or something..

Hi, I wouldn't venture to guess what is wrong with you but I strongly recommend you talk to someone. I have/had similar experience these past four years. I know mine is related to my major depressive Dissorder.

You have not gone insane, because you realize something is "not quite right." It sounds like talking to a therapist, or discussing your concerns with your GP (they should be able to point you in the right direction), may be really helpful. Give it a try.