When we tell ourselves that we are being logical to the point of surgical precision, who are we trying to fool? None of us have brains quite that big! There will always be missing facts or flaws in our theories. Trust what now seems to be our deepest, wisest most intuitive feeling. And don't waste time trying to back it up with pretend cleverness.
If we allow something or someone to matter to us, we make ourselves vulnerable. We lose our ability to feel safe within a non-committal bubble. We must go up and down along with the fortunes of whatever (or whoever) we have cast in our lot with. All well and good when things are going as we might wish. Trickier when we care so much, it hurts. That's one reason why you're often so careful about who or what you extend sympathy to.