The thing is, you gotta be selfish and ignore everyone in order to successfully ctb. I wonder if I'll be able to...! (I'm trying to live on, for now)
Ctb isnt selfish. Its a decision, yes, but not a selfish one.
When it comes to suppressing guilt i find its easy once you realize the world won't experience the slightest change whether you stay or go, even for the people in your life.
When you lost a loved one, were you crippled forever? Did it cause a global war? Or did you take maybe a year to get over it with the occasional bittersweet memory afterward?
When people die, nothing at all changes. People want to believe it has an effect, but they're being overly sentimental about death. When you die (no offense at all intended, the same thing applies to me as well) everyone will just miss you, and thats it. They'll forget you and move on. Your gf will find a new man, probably better, your parents will do what they've always done when they dont talk to you and same with your friends of 20+ years. It sucks but humans are strong when it comes to adapting.
That doesnt mean you should do it, take the time to examine what they bring to your life, is it good? Is it bad? Would you at all be happier if THEY were to leave your life? Examine things from the outside as a stranger to your life before committing