Yeah he invited his ex to the wedding.  Why?  Never discovered that.  Also why was he making out with said ex? As someone else commented: why would the author even involve the ex's in this story if the situations weren't going to be resolved.  That was very annoying.  He just wanted her to trust him on things and accept, but what he was asking was what she had lived with all her life and she didn't want a life like that.