Going Pro, What should I tell the boss?

[FiftyOuts]

I have decided to play poker professionally. I will submit my resignation letter on Monday, June 4th.

I was wondering what I should tell my boss and coworkers. Should I tell the truth and state that I'm going to play poker professionally or make something else up (i.e. such as taking time to travel)? I want to leave on good terms and would like to have the door left open for me if I choose to return. My boss and coworkers know I play poker but not as much or well as I do.

Any good advice would be greatly appreciated.

P.S. Please don't give me advice on whether to go pro or not because I have already decided.