Can You Ever Truly Run Away From Your Past?

Pardon me while I vent a bit but I really, really want to know the answer to the above question. Try as I might, I cannot ever seem to run away from my past and it's pissing me off! Listen, I get it - the crap from our past is what makes us who we are, so our past is important. But for futz sake, why is it the things that I most want to move past, forget or just minimize DON'T EVER GO THE EFF AWAY?!!?  I'm reminded of a quote I read recently:

“The past is nothing but a weight. It will build inside of you like a stone. If you hear the past speaking to you, feel it tugging at your back and running its fingers up your spine, the best thing to do is run.”

But sometimes you cannot run fast enough to rid yourselves of the pain and sadness that just weighs you down when you least expect it. I did some research recently on this annoyance and according to one expert, it's all about unfinished business.  Here's the gist of what he says:

"Having unfinished business is like leaving a movie before it is over; you never know the ending. You never know who survives or thrives . . . Perhaps the most serious of unfinished business is that of tattered relationships left to decay. This can be one of the most serious types of unfinished business because it may be the cause of some of the other negative feelings you have from the past . . . Think back on a past relationship that just dissipated and you (or the other person) did nothing to bring the relationship to closure. Bringing closure to this unfinished relationship does not necessarily mean that you have to write the person, call them, or meet with them (although you may choose to, and in some cases you may have to); it means that you are going to take the necessary steps to bring this relationship to its natural end. It can happen as simply as forgiving them in the privacy of your own mind and soul, or sending them an apology for the wrongs you committed. Regardless, the unfinished business of relationships can continue to cause damage to your self-esteem." [emphasis added] 

Fo' shizzle on that bolded sentence.

I've tried so many different methods to find closure on some past relationships but I still feel like I've got unfinished business from those relationships that just will not rest. Well, I suppose I'll just have to keep on keeping on.