Want to give a new start of my life

Hello girls,

I have been a nice guy all around in my life. Have fallen in love twice[both one sided] but got hurt big time. I am fat, little bit clingy, jealous, possessive guy as I don't have any female friends so all my life I looked to get one girl in my life named as Girlfriend. But all that theory came back and hit me in my ass.

So now, I wanna start all over again. What qualities should I learn or understand to make sure that Guys like me as Pal and girls want me as Lover.

I know this sound wanting but I am asking in a good manner.

So girls, please tell me what you see in guys. What can I do to improve me. I have tendency to go over the limit for the things I like. So I will do whatever possible to achieve those quality.

Women at my job place are full of attitude and I really want them to be my friends, but somehow not getting confident enough.

My theory - just be yourself! I don`t like to change people...

Somewhere out there is a girl who likes you the way you are :)