Legba says fuckit! lol
Honestly, the best way to deal with that type of thing is to do your damnedest not to appear to be too upset and just stop talking to this "hommie". Don't lash out at them, and don't even bother trying to contact him/her. But if they try to contact you, don't ignore them, but seem disinterested. Give them lame excuses not to chill. This will trigger their guilt then they'll wanna hangout & maybe even talk about it....Unless you're really close, then just ask em what the deal is lol.