the Lord leads

Can a person grow weary of doing good even when he has not been doing that much?
I always want to think I'm in a tough position here at school. "Always running around" has become a daily proclamation. And it sucks that it's my fall-back, my excuse, my reason for tiredness, and why I don't know anybody deeply. If the 30 hours a week working were taken away, would I finally decide to "be here"?