As a general guideline, if I'm not having fun with a roleplay, I don't keep roleplaying. Having fun is a chief goal, so if other players or the GM is ruining the experience for me, I'll politely inform them that I'm dropping out and vanish.

Rule of thumb: if it feels more like a chore and less like a pastime, it's probably not fun anymore.

(I'm lucky enough to be GREATLY enjoying my roleplays at present, though... I'm actually really loving GMing on this website thus far, too.)