does anyone here stay friends with people they are splitting on? 

I recently went through a breakup and feel a lot of warmth towards the person I was with but everytime I see them do something I don't respect my feelings for them change a bit. Some of this behaviour fed into why we broke up, but this was never really addressed, the given reason for the breakup was mainly my illness and that they were not strong enough to deal with that. 

All of their flaws are gradually kind of hitting me. But when I split on friends I immediately distrust them &amp; don't want them round me. Even when actually in a relationship with someone, the swings seem to be more dramatic. 

However I've noticed with exes, I've noticed that from when it ends, my opinion of them just goes down &amp; down as the 'spell' of being really into them wears off. Until I see them for being a flawed man &amp; sort of pity them, even if I still love them. I might still miss them &amp; stuff &amp; even feel attracted from time to time. 

It doesn't feel as dramatic as other times when someone goes straight into the 'enemy' pile &amp; I'm not sure whether it's splitting, or just a normal part of getting over someone. I guess I want to know because I want to know if I am being narcissistic, or unfair to them or whether this is something I need to work on. 

It's probably a stupid question but I just have no barometer for what's normal