This dilemma has actually been kind of up-front for me in the last few weeks. I've been in a state of depression, and this has come up a lot, since I always try to be rational. It's not like I try to rationalize suicide, but most of the paths I've gone down in my head lead to suicide being the most logical option. (Of course, I haven't actually done it. I find myself hesitant to take my own life. Something to do with instinctual urges to stay alive and stuff, I guess.)
See, I've come to the conclusion that people are too stubborn to actually change their thinking when confronted with an argument that defeats their previous ideas, so actually persuading people to be different is impossible. I, being a communistic atheist, find the world we live in today to be extremely miserable for me. My philosophical beliefs are widely hated, and no matter what I try to say, people will never change from crazy anti-atheism (if they are) to normal let's-just-get-along mode. The economic stance I have has been given such a bad name so far in history that people seriously believe I advocate slavery and genocide, and no matter what I say, they'll never even try to see what reasons I have for thinking what I do. They just immediately assume, and their original assumptions aren't ever abolished. No matter what I say about why I'm so disappointed in the way schools work today, everyone just assumes I'm trying to be rebellious instead of seeing if the things I say have any merit. No matter what I have to say about any topic, everyone refuses to listen to what I have to say if they disagree, and immediately assume that I should be ignored, instead of objectively analyzing my position and seeing what might cause me to believe what I do.
Overall, I'm different from everyone else in the ways I think, and it's impossible for me to ever "deal with it" unless I want to just conform to everyone around me, which I won't. So, I can live in perpetual disappointment, or I could just be removed from society (that is, die), and society would be happier without those like me in their midst.
It seems logical right now, but I've realized that thoughts like this are a symptom of depression, and even if I think they're logical, they may not actually be (not being able to recognize lunacy from within its own shell and such).