Responsibility

It seems we all have a tendency to not take responsibility for our own actions. (Myself very much included.) It's so much easier to point the finger and blame someone else than it is to take action and realize that it is none other than ourselves that are to blame.
Eleanor Roosevelt once said "No one can make you feel inferior without your consent." So why are we constantly saying things like "You make me feel this way!" when in all reality, we make ourselves feel "this way".
For example, I feel guilty for things in my life that have happened; things that I have said or done, but that I can not change. I can look past it and try to forget about it...but everything lingers. Is this my fault? Short answer. Yes. It is. I'm not being cruel to myself in saying so. I'm only admitting to the fact that I haven't faced these issues like I should have. No. I can't change the past, nor would I want to. I wouldn't be who I am today without living through what I have.
What I wish I could change is the hurt than has come along with it...not only to myself, but mainly to those who were involved. But I can't do that either. So where does that leave me?
Do I revisit this past in hopes that I can find some sort of conclusion? Or do I accept it for what it is and move on? We only live once. And I am a firm believer in living in the present. However, my brain and heart fail me in constantly going back to past issues. It's not easy, nor do I think it's really possible, to let it all go. Perhaps the point to be made is that it should be remembered, for whatever reason, but not re-lived. Perhaps that's what I need to work on. What we all need to work on. Remembering and accepting because it can't be changed, but not remembering so much that it causes the same pain as it did once before. Or is this feat even possible?
I find it is so much easier to forgive someone else than it is to forgive myself. Perhaps that is what I am truly afraid of. I don't want to keep offering up excuses like "I'm only human" and "we all make mistakes", "No one's perfect." And yet, I am more inclined to accept these excuses from everyone else except for myself. Why is that? Because each of these "excuses" are true. I guess it's just too common for them to be used too often and I don't want to fall into that trap.
And another thing, why is it so much easier to say "I'm sorry" to someone else than it is to say "I'm sorry" to ourselves? In the end, ourselves are who we are responsible for. So, maybe we should start focusing on taking care of ourselves, before taking care of someone else.