Take prozac? You could be a manic depressist, it's always possible :\
If it's just rooted in your problems, you've seriously gotta lighten up. Your parents, despite the fact that they'll be with you for most of your life, aren't omniscient, just because your mom's yelling at you means you deserve it. Girls at our age can be total bitches, too, so that's not much to be concerned about. I find it also helps to, you know, try to bond with them without them actually realizing it. Say, if you ever happen to be together, just start talking to her about really mundane school stuff, and build up from there until you're friends. It works pretty well, trust me.
Suicide, as cliche and pseudo heroic as it may sound, is not the answer. You've got two stupid little problems, one of them over a girl, when you're only 13. The mom one is a little more pressing, but I'm sure that'll fade away in time, too. At least you've got friends willing to cheer you up, that's a definite plus.
~Dorian Gray