Sometimes you can't let go of what's making you sad because it was the only thing that made you happy.

I think… it’s important for us all to learn to look at things in the big picture rather than cherry pick. Big picture, something that on occasion made you feel good, but most of the time was painful isn’t happy. The only thing to focus on is why you were happy in those particular moments and how to go find that elsewhere in a more consistent way. often we find that what we thought was happiness was just momentary relief.

This is true. We are familiar with what we have now.