Thinking Of Suicide
Now, I'm no doctor, but I have been in the same spot you are in right now. I can't really tell you what to do, but I can tell you what I did and see if it will help you too.
You have to remember, this isn't a perfect world and you will never be totally happy. So if you had thoughts on that, you can basically forget it.

This isn't one of the things that are quick to turn from. This takes time and effort. What I did is I called an Emergency Crisis Center and they brought me in right away to talk to someone. So I told them everything, What had been going on and what I tried to do. The first thing she told me to do was write. Yeah, I thought it was stupid too, but I did it. And to my surprise it helped a lot. She told me whenever I had that feeling, to just write it in a notebook or on a sheet of paper. I would write for hours on how I could do it, why I wanted to do it and all that jazz. When I went to see her again, she read it and she asked questions like "why?" and "Whatfore?". And when I told her we sat for a few minutes in quiet and I thought of why and whatfore, and I thought it was the most stupidest thing to kill myself for. So what, Mom got a new boyfriend, I should be happy for her, right?
Oh well, my "best friend" stabbed me in the back, I can do better than her.
And I did. I got use to my Mom's boyfriend and I got great new friends.
And if you ask to be put on depression meds. I'm pretty sure they'll start you on something. Believe me the littlest things that doctors tell you to do, help in a really big way. Trust me, I know where you're coming from.