I don't think I should feel guilty.
Would it be possible to give me a few more details about what you're dealing with?
I understand your point, but I certainly haven't any intention of discussing it.
I respect your privacy and if you don't have anything you feel comfortable sharing, I understand.
Hey, you should be coming to me with issues which are more interesting.
I'm okay right now. If you feel like talking later on, please let me know and hopefully we can talk through whatever you're dealing with.