You have more reason to live than most! You have a firm goal in mind... Lose weight and become healthy and fit. This is a GREAT reason to live.
Perhaps you have no friends because of your outlook on life. There are plenty of "fat" people out there with friends. Maybe you will build some character and charm during your goal of eating right, working out, and becoming more healthy.
No matter what you decide, it is unfair to put your burdens and downfalls on the shoulders of other obese people.
You are correct about life being hard. Life is very hard... Sometimes harder for some than others. But, I think that suicide is a silly answer to a tough question, What is the meaning of life? Why not face-up to life and push back? Challenge yourself. Strive to become a better person with a better outlook on life. Working out will help to relieve some of the pressure. And, eating healthier with help give you mental stability and balance.
How old are you? What do you like to do?
-Rip