I have a few former friends, and our friendships did not end on the best of terms. Though it’s been months, and I haven’t seen them since, I’m still very angry. After all the torment they put me through during the years that I’ve known them, I find it difficult to let go and let the past stay in the past. Every time the thought of them pops up, I just become filled with rage against them. I know it’s unhealthy, but I don’t know what to do about it.