I'm in a bit of a dilemma here frens

>Work at pizza shop part time
>Normally work Tuesday evenings
>Tuesday is quiz night at uni tav, my only consistent option for social interaction
>Really wanted Tuesday off for a change, at the time there was no other option
>Recently asked to work Mondays instead
>Request granted
>However boss is now in a dilemma, most people want Tuesday off too
>He has to work Tuesdays now, as well as a high school girl who he asked to come in

My boss is a great guy and I hate to add extra burdens on him, but I know that without this consistent social interaction on Tuesday nights I will slip back into the depression and loneliness that I worked so hard to get out of.

Am I justified here? Or am I a selfish prick?