Was Chase right in doing this?

So recently I found out the guy (we’ll call him James) I was talking to for a month let my ‘best friend’(we’ll call her Lily) give him a blowjob. Then both of them hung out with my the next day (at separate times) and didn’t tell me until later.

So I had a conversation with both of them and decided I was going to give both of them another chance but last night I was visibly upset and ended up telling my sister and one of my best friend (we’ll call him chase)

So the girl who did that with the guy I decided to drop her because she knew better than to do that and I’ve already given her a chance. The guy I was going to give another chance.. then chase told me if I gave the guy another chance then I needed to unfriend him because he didn’t want to see me get hurt.