I can't help but feel that if Facebook has such a huge negative influence on your life, the problem isn't Facebook but something deeper you need to resolve in yourself. If you're getting hopelessly addicted to Facebook or letting it make you feel bad, you're probably just going to replace it with something else until you fix the reason you let it impact you that way.

I use Facebook to keep up with friends and arrange events. It's a useful communication tool and I don't get caught up in it any more than that.