Is it ok to miss someone, but at the same time realize that they are no good for you?

That’s my estranged spouse in a nutshell. I still care for her very much, but I can’t be around her anymore. It’s good when someone remains dear to you despite them not being good for you, but it’s even more important to realize when they’re not, so you’re not subjecting yourself to being in an unhappy, unhealthy relationship. Everyone ultimately has to be out for themselves in the end.