Will I never learn?

This year I will have my 48th birthday and yet at times I feel like I'm back in Jr. High. Why do we keep people in our lives (even in the slightest way) that want to cause us hurt and pain? Why can't I just walk away? I have always tried to be a good person, someone that does not deliberately hurt anyone or anything, and at times (like now) I feel like that is my biggest fault. I need to learn that there are people in this world, my world, that do not deserve that kind of treatment from me. Thank God for the love and support of DKK who is always there to wrap me in his arms and even tho he has no clue why I need that hug so badly, he's always willing to give it.