Is suicide the only option for me?

I've been considering suicide for quite some time now and almost went through with it once (gun). For the past 4 to 5 years my life has been heading in a downward spiral and I don't know if I can take it anymore. It started right after I got done with the 8th grade because I used to have a small group of friends and I got in a fight with one of them and all of sudden we stopped hanging out. Those friends were the only thing I had, I even developed an eating disorder to lose weight so I wouldn't lose them and so I could maybe get a girlfriend. But after I lost my friends I became very isolated and didn't have any friends throughout highschool. I also gained a lot of weight to, when I was in 8th grade I weighed 160 pounds and now at 19 I weigh 330 pounds. The only thing that's given me happiness was video games for the 4 to 5 years. After I graduated from high school I was hoping college would be the cure all for everything but with a combination of my appearance and my lack of social skills it ended up being the same thing as highschool was for me. I tried asking my parents for help but that didn't help because my mom is always so worried about my dad's alcoholism so it was just forgotten about. I'm severly obese, have no friends, never had a girlfriend or even kissed one, not in school, and now my only source of happiness (video games) isn't any fun anymore. When I held a loaded gun in my mouth a few months ago I thought life can only get better, but the truth is it hasn't. PLEASE HELP!!!!