Am I overeacting?

My boyfriend has a friend, I'll call her S, who I'm not sure I'm overreacting about. My boyfriend's best friend, I'll call him P, has joked about S and my boyfriend several times. A couple years ago, someone told me P was joking about my boyfriend and S in a suggestive way. I didn't hear about what specifically was said and my boyfriend assured me it was P being weird when we talked. This week, I've overheard P joking about her again in regards to my boyfriend. Saying my boyfriend is simping for her. I've been getting to know her recently and she's said she wants to be friends. So I don't think she's done anything (she seems so nice) and I don't think they've cheated. I just feel like maybe something happened in the past for P to joke about her and my boyfriend being together.
Am I overeacting?
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