You aren't remembered as Xavier's killer. That isn't your legacy. You are their leader and brother. You pulled them from the brink of extinction. They love you. And like any family they get angry with you when they think you can do better. They are heartbroken over you when you die. It isn't just me, I promise.
There has to be a middle ground between taking care of them and making yourself miserable in the process and forsaking it all for the sake of selfishness. You can feel you owe them, fine. What do you owe yourself? You carried mutantkind on your shoulders. You deserve a break. I can't just let You deserve better than you know.