Sometimes, the past has a way of creeping back into your head. You remember good things, you remember bad things. Those thoughts might make you feel weird/nostalgic/dumb/guilty/sad/envious/etc, etc.

A good friend of mine reminded me that it's OK to think of the past sometimes, just so long as it doesn't consume more than a few minutes of your time. 

One thing I know for sure, is that my life is good right now. Even on days when I'm feeling low. There is always much to be thankful for. 

... Like the fact that my past is in my past.