I actually appreciated Lily. Lily always had my back, where as Kenny made me "Handle it myself" during the last pharmacy run. I'm not sure if that was due to my interactive choices, or that happens each time, but Kenny kind of ticked me off right there.
Lily always seemed to have your back, if you sided with her, although she may not have always agreed with you. Both of them saved my bacon, at least once, depending on who you sided with. Lily, however, like Kenny, does let you down if you defend her to the end. When she drove away, without me, I was pissed.
Needless to say, it's starting to seem like everyone will let you down at some point, throughout the game.