What is fun? Fun is doing something enjoyable, pleasurable or entertaining. Do a gut check on yourself right now. Are you having fun at work?
The important question to ask is whether or not you're happy. If you don't know if you're happy, ask someone. Do you dare ask your spouse, close friend, son, daughter or co-worker if they think you're happy? If you have the guts to ask, don't be surprised by what they may say.
I've learned two valuable lessons. First, things don't always go the way we want. Second, co-workers have the same hopes and dreams as everyone else.