It is much easier to be pleasant to someone you don’t know or care about. Be glad it was only 5 years wasted, and not 25. Seeing that person have to figure it out is probably the best thing they needed. Either way, that is no longer your responsibility and you need to let it go. You only hurt you. Right now at this moment you are thinking of this person. Not any of a zillion other things. You could be laughing at a sitcom, indulging in a Pinterest recipe, listening to music or laughing with a friend.
Instead you are here, angry with someone that probably isn’t giving much thought to you. I don’t mean to be insensitive, but that reality is what matters. It is what made me stop “enabling” the man baby I created with my ex, and allowed me to eventually not really care about him. There is nothing he can do to me, to interfere with how happy my day is with our child. He can ignore texts for school supplies, never once take the child to a doctor or dentist, withhold child support whenever he gets in his feelings. He is going to be who he is going to be.
The sooner you realize that, the sooner you can decide who YOU are going to be, ans step to it.
It’s much better on the other side! The grass is greener here because no one is pissing on what you worked so hard to nurture.