I'm not saying forget about whatever it is that is bothering you. Those chapters in our lives shape us. What you can do though, is come at peace with these times. Accept them. Honor them. And move forward.
Can I do this? Can you teach the proverbial old dog new tricks? I have no idea. But I figure if 13 years ago, I could stop doing something I couldn't seem to go a day or even a few hours without, anything's possible.