I'm going to put off talking about getting back with my ex till after my vacation
Why would you want to wait till after your vacation to talk about getting back together with your ex?
Because I always have a blast when I ignore her.
A good relationship is about having good communication. It seems like you don't really want to get back with your ex. Rather than drag things out so you can have fun, you should just tell her you to want to call it quits.
Maybe I should. Or I could just date other people who I don't get along so well with. But then that wouldn't be any fun.
It sounds like you're not sure what you want. Maybe you should put off relationships until you  figure out your needs and how to communicate them without harming others.