I don't see it that way, but that's me. I take it personally, that a lack of interaction with others and the isolation it causes is because of my doing, that as a GM I should've done more - or anything to encourage more active participation with those who were always going off by themselves. I don't like it in any RP where characters get left out, so I feel more responsible here for letting that happen. 

I realize apologies aren't going to fix things, but I've always been upfront with my thoughts on issues, so I am with this as well.