Jealousy is never a good thing Bro...in the end, the only person it hurts is the person being jealous... and nothing good usually comes out of it. Ask yourself if the things you're jealous about are actually WORTH being jealous about? If you worry too much about what other people have, you're not worrying enough about getting it for yourself...
As for hating your life, maybe you just need to sit back and self evaluate for a little bit... Are some of the things you hate about your life things you have it within your power to change...? Do you care enough to try to make those changes? I don't know how old you are but if you're younger, then I'm sure you have plenty of time to change some things...if you're older, it's never too late to try to change until your ass is DEAD. Probably don't need to make too many changes at that point...LOL But you get my drift...
My golden rule is to NEVER LET ANYONE ON THE INTERNET GET ME TO LOSE MY TEMPER. It's easy to let people get under your skin....but the point is, they can't get under your skin unless you let them. Sure people do annoy me at times on this site, but it's never more than just that...an annoyance. I never take anything personal...
Sorry for the commentary here but I hate to hear anyone say that they hate their life...I've been in some seriously shitty situations in my life, and one thing I've learned for sure..."No matter how low you are in your life, unless your ass is DEAD, it will get better."
Hopefully you don't have to kill somebody to make your life better...but if you do, be smart about it...LOL