I have an amazing future and a pretty good present, so why am I worried/concerned/frustrated/self-conscious/giving a fuck at all about my past? I have spent so much time and effort building my self-esteem and moving toward the life I want. But I am embarrassed by the person I was and the life I had. Besides using my past to learn lessons, why do I care about it at all? I let reminders of it shake me and my confidence. Doubt creeps in and I forget the most important thing: who I am now.
Rather than continuing to move ahead, I sometimes slip back into the past. This can actually propel me in the right direction. But only if I don’t dwell there. Instead, I need to recognize what lesson I still have to learn, and then keep moving forward.
“Up and at ’em, Atom Ant!”
celebrate the (blank) yet to come 
Good question. I think for me, it was familiarity. The past I knew. The now I was never quite sure of, and the future was sometimes scary.
As you may well imagine, I have spent some time lately in my past. I examined what I could and have once again moved on to the appreciation of my present. I do that most of the time now, but there was a time when I was much like you. I can’t even pinpoint when this change all happened, but I know I finally got to a point where I was tired of being unhappy by living with my past. My happiness is in the today, and I finally decided that I deserve the happiness that today brings.
Good luck in making the changes necessary to keep moving forward. You are worth it.
Yeah, there’s a comfort in the past. It may not be good, but it is known, unlike the scary future.