It seems like my neighbor is smoking weed. He is in probation. when someone is in probation how often do they drug test them

Constantly. Hes being tested as we speak.

But im sure you have enough going on to be worried about him.

Think about how unhappy your girl/wife is with you...
Think about how theres no more room to advance so youre stuck in this dead end job.
Think about how you told yourself you were going to start getting in shape but havent done a thing.