Dude basically being overweight took all of your self confidence away from you. Almost all of the shit talking that you think others do are in your head only. To be real, nobody really gives a fuck about you even if you are 150 pounds or 300. Everybody has their own lives to worry about so if your name is not Jessica Simpson or Oprah Winfrey, you being fat does not really concern, bother or take place in anybody's conversation. You need to suck up and realize that your fears are being created in your brain only.
I'll give you an example, when I was a kid, I was scared of Vampires. Only vampires, not Freddy, not Jason, not monsters or any type of serial killers. Just vampires. I was so scared that I would have trouble going inside a dark room, or be alone in the house. I never said this to any of my friends or family because I did not want them to think that I was a pussy. Over couple years this fear of vampires started to make my life somewhat uncomfortable, my mom wondered why I kept on trying to talk to her all though I was 2 rooms over etc.. ( I was thinking if I am talking to my mom and a vampire got me, my sentence would get cut in half and she will realize that something wrong)... Anyways, after a while my fear turned to anger. I was really fucking upset at vampires for making me feel like a pussy, one day I was alone at home I walked in a dark room and started screaming. "Fuck you mother fucker, come out and fight you bitch, its you and me , right here right now!!!" I'd like to remind you I was around 7 or 8 at the time. After swinging a couple punches in the air, I felt a big load come off my shoulders. There was nobody around. I was comfortable, finally. Sometimes still to this day, when I walk in a dark room and obviously no vampires attack me, I smile to myself and say " Thats right bitch, stay in the shadows or I'll fuck you up"
Moral of the story, if you can turn your fears and tears to anger and madness, it works out pretty good.