Give yourself time Matrix, we've all (well most of us) been through a breakup at least once before. It hurts, it hurts like hell, but it's no reason to give up living. You WILL come to peace with it, I guarantee it, but it takes time...sometimes a long time. You need to give your mind a chance to work around it.
Think about the people that care for you, that care about you. Why would you do this to them? You are going to cause them so much pain and they might even blame themselves for it. Please, don't be hasty. Talk to somebody, even me or somebody else here if necessary.