thats my problem....
My exact issue with two females from my past
i dont find it that hard to forgive folks, i can easily forgive and just not associate with them any more
its much harder to forgive yourself tho. especially if your mind wont stop triggering bad memories and regret.

What you can do here, which without maybe a therapist or counselor to help you get to the root of the feelings is to reframe.
Reframing involves looking at the situation from a different perspective. To oversimplify the process its basically turning those negative situations into a positive or putting a spin on it.
Like I have issues with trusting a job or company therefore I want to work for myself, I promised myself I wont ever 'trust' a job or career again and that I will start my own because I dont want to necessarily have to attempt to meet the everchanging demands of a workplace or another boss. But because of what I went through I have gotten so much more education and become a better person, I know I wouldnt be who I am today without that experience.
or the one that got away from me, from consistently analyzing and over analyzing every aspect of our relationship, now I can come to realize where I made mistakes and particularly accept that she wasnt for me and I wasnt for her no matter how much I would have liked it to be. It took a long time for me to come to that realization that in the midst of I was just like "damn I felt so much for her I cant believe this, what did I do wrong, what can I do to make it right etc." Now I have the self-actualization to be able to honestly say "it was fun while it lasted, I did make some mistakes, from where we were at and where we were going it probably wouldnt have lasted but because of it I have grown as a person and I have more to offer someone else in the future."
in short to reframe your experiences is to gain insight from them. once you really break down to the root (i like to think of peeling back layers of an onion to get to the core) you start to feel better about the situation and yourself and thats when you move on.