Dude, if you think that you can't reconcile it with your mom and if you really are at this point ready to take that final, rather permenant, step then tell her about your sexuality. If she doesnt like it, then you can carry on with your intended course of action but if she is cool with it - then i hope it gives you reason to think twice.
Disclaimer and anti flame statement.. :
I in no way condone, or support suicide in any shape or form except for the terminally ill.
Suicide in itself is not wrong.
What IS wrong is the effect it has on the people who love you and care about you.
Re-reading through the thread a common theme seems to be "just give it a few more days", and thats life frankly - just giving it a few more days, and a few more on top of that...
I dont know you at all, but that isnt the point - You are not terminally ill, your suicide would be an unnecessary tragedy, not justified, and it upsets me that you have got to the point where you think it is the only way out.
There is nothing wrong with you or what you are feeling, but you have to deal with it in a different way to what youre thinking of.