Well this information is no surprise to anyone who has ever been involved with a Libran - Male or Female. Charming, witty, generous, loving, sexy, full of great intentions, dreamers, but also on the turn, selfish, cold, hurtful with their words, pessimistic, non committal and there is 1 important person in their lives, them. Loyalty begins with self and then returned in small doses, just enough to keep you there.
We have got to admit they fooled us all and we loved them at the time, so either we put up with it or get out, and never try their games for they will just cut you out of their lives. They will pull you back in for a few games, but they are the only ones to know the rules.
I dont think they mean to be vengeful or hurtful or selfish, its just the way they are, non committal, not able to make decisions and although they come across as being strong and secure, if you look at it all they are insecure, hence the need to have 2 partners at the one time.