I have 1 month holiday from my college and am wondering how should I best improve myself and my SMV.

So a bit of background: I was sort of in a depressive haze most of my teenage life, wasted most of it, and never really made any good friends. I am somewhat fat, my face looks ugly, and am pretty short (5' 5''). As I've found over past couple months I don't know how to make friends or how to keep them around. I am neither interesting nor funny. In short I am socially retarded. I think that I have some deep rooted insecurities and trust issues with people.

Right now I am going to gym 2 times a week and reading "How to win friends and influence people". But neither of them seems to have helped me much.

Whenever I see people parting or having fun, it just makes me realize how much of a loser I am. I don't want to be this guy anymore. I don't want to be this loser!! I want to change.

How do i change for better in the month I have? I want to make to most of it to improve myself and my SMV.