I also don't think there's anything wrong with being honest, and saying something like "Look, I know this was -- and is -- important to you, and I've admitted that I've not always been good at it. I get that, and I think I understand what you need now in that regard -- it's an important emotional need of yours. However, you need to understand that considering what's going on with you right now, I'm not particularly motivated to be meeting your emotional needs right now. I don't mean for that to sound mean, but it's just the truth and it's probably what you're referring to."
