Friends Sorting

I was talking to my friend about how I want to erase some people in my life. It's rude, I know. It's mean, hell, yes, I know. But, sometimes it's kind of hard to keep them in my life. It's hard when you have to deal with things that you actually avoid to remember or reliving, things that you are trying so hard to forget. Yet, you could not erase them that easy since they all related to your other friend. One after another. So, what should I do? Avoiding alone is not enough...