A very good friend of mine told me, whenever I feel down and unloved, I should picture her in my head telling me that she loves me. It really helped the several time that I've had dark thoughts in my head.
Also, the very same friend told me what other love ones of mine would think if I commit suicide. "He didn't love us enough to stay." That's a pretty scary thought that the dear ones of mine would think I don't love them, so it also helps.
Dunno if it helps, but uh...