<human>: I have a wierd problem that is so pervasive that I don't know how to deal with it. I try but I can never shake it and I feel like it holds me back. 

I live in a constant fantasy world. I can't listen to music in earphones without fantasizing about being the person who made it, for example. I have in-depth long term fantasies with multiple characters and links into pop culture. 

I know these are fantasies, I'm not delusional, but I feel like it saps me of my ambition. I fantasize instead of following through on things I should be doing. 

When I feel sad about something, I fantasize about people knowing sad and how they would react. I do this thoughtlessly. It is my natural reaction to almost any situation. I spent half an hour today imagining my wife's friends reaction if I could box. That is embarrassing..

I really want to stop. How do I go about this?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I have a pervasive problem with fantasizing about everything including people's reactions to things I could do, usually something good.