Understanding Relationships

What do you do if someone you care about cares about people you don’t really care about because they’ve hurt you.but I still have to interact with them. I get where she is coming from, she’s a lover and truly cares about them but I don’t care what happens to them, they made my life hell for a long time and now that I see an end in site to being around them because the business is closing I’m having to pretend that I give a shit about them and I can’t. At least not convincingly. Maybe I’ll just keep focusing on the work. I do not owe them anything. Just gotta do what I’m getting paid to do until we all cash out in the end.