Please don't commit suicide. No matter how miserable you feel, and how hopeless the future looks, you shouldn't resort to suicide. There are always things you can do to make life better, even if they are only tiny little things sometimes.
It's important to remember that you never know what the future will bring.

I suggest making a list of the factors which are making you so unhappy. Spend some time thinking what you can do about them... there many be nothing or very little you can do about some of them, but usualy there are a lot of things people can do to become happier, though usualy they are things that take some time.

You mentioned a degrading job, people hurting you, and a lack of sucess at attracting guys. Those are all things you can do stuff about. It can be difficult to get a job you love, but you can do things like apply to a different but similar job which will look better on your resume, or take a course in something in your spare time. You can resort to online or correspondence courses if you really have to- they're not really as good but they still count for a lot. Dealing with things people say to you is usualy related to social confidence and self esteem, or sensitivity about things you feel are wrong in yourself. It's a matter of figuring out whats causing your sensitivity, and working on it. Attracting nice gay men sounds like the hardest thing, or so i gather from my best friend. You could be imagining your unattractiveness due to low self esteem, you might not look very good, or it might be your attitude or persona thats causing your problem. Figure out which it is, and do stuff about it. There are always a lot of things that can be done, like working on better posture, smiling more, doing your hair differently, etc, and every single thing you do makes you that little bit more attractive.