At what point does patience become self-disrespect?

I’ve always believed in being patient with people. Giving them time, understanding their situation, not reacting immediately. But recently I’ve been questioning that. How long is too long? When does understanding someone turn into ignoring your own feelings? I keep telling myself “they’ll change” or “it’ll get better”… but nothing really does. And now I’m wondering if I’m being patient… or just not respecting myself enough to walk away. How do you even know the difference?