Frustration runs deep

Why is that dwelling on the past, reliving the past, remembering the past, and whatever else with the past is always easier than focusing on today and anticipating the future? I struggle on a daily basis with these ever-present thoughts of the past instead of living for today, enjoying what I have in the here and now, and just enjoying the moment. Could it be that I constantly surround myself with memorabilia of the time passed? Could it be that I wish I could back in time and right the wrongs I made? Or could it be that the single most precious and valuable thing in my life is a daily reminder of the past? Frustration then stems from not having answers to important questions. Important questions such as "what if?" and "what did I do so wrong?" and "why that one, not this one?". Will I ever have answers? Will I ever be able to forget and just move on? Forgiveness is a difficult thing. I think I have forgiven the people in my life who have done me wrong, but that does not mean that I have forgotten those wrongs. Does that mean I will carry about that baggage of the inability to forget?