Sometimes I find that it can be a double edged sword. I remember making friends from the hospital, and the doctors were not too happy about it. Sure, they do understand. But I realised after that they kinda weighed on me.. in a sense that they depended on me too much more than I depend on them. It was a really bad emotional investment.

Same goes to PC. You have to be selective... But if PC has been largely beneficial for you, no reason to leave.