Do people who you couldnt stand or who made your life miserable by their selfish actions (but you kept cordiality with them) ever act happy to run in?

Into you later on? I just ran into my roommate from last year. Him and his girlfriend kept smoking dope making my life miserable and they scare me too like something off about them but he wants to hang out im like wait what. Lmfao! I guess if you're nice to people and stay cordial they have no clue how you really feel about them. That's so crazy
Do people who you couldnt stand or who made your life miserable by their selfish actions (but you kept cordiality with them) ever act happy to run in?
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