Is it likely my boyfriend will find out I was one of his cousin's HS bullies?

We're both 26 years old and been dating for a year now.

In a weird twist of events, at some point I find out his female cousin (our same age) is the girl a couple us bullied in HS. Obviously I doubt she has forgotten. We've only met once at a recent family gathering this month. That was a shock to me (awkward moment for sure) and well I just greeted her as if I was saying hi for the first time. I pretended not to know her as a way to start over. She left after only being there less than an hour. I believe it was my presence she didn't like.

I don't think she has told him anything. Then again I don't know. Is it likely he'll find out?

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+1 y
From what I know I can't find her on any social media page at all. I don't know her number either. I think she has it all set up in private. What I'm worried about is she's going to likely tell him and then I have some answering to do.
I've been running away from this past and now this.
Is it likely my boyfriend will find out I was one of his cousin's HS bullies?
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