Can I refuse to help clean?
Well, why do you not want to clean? Are you feeling unwell?
I have a lot of things on my mind lately, and my friends have been really slacking off.
Pitching in towards community labor goes a long way. Put your pride away and help clean up.
I think that you misunderstand that I just can't really do it right now because my mind isn't in it.
Your mind doesn't have to be "in it" to care for things. You're expected to help, and so you should help-- how would you feel if others refused to help you do things that you really want to get done?