I get what you're saying, but with both these scenarios -- (1) "going out when you don't feel like it because a friend needs your support" or (2) "telling a friend you don't feel like going out because you're feeling down, but they realize they have the energy between the both of you to buoy your low spirit" -- these are both important social negotiations that make us better at human'ing. An app that attempts to take them away is one that makes us less good at being the best sort of human to one another, imho (and more likely to fall behind on the practices that keep social anxiety at bay).

All just my opinion of course, and spoken from a place of care :)