Is this weird

So I really like this guy at school. In my math class yesterday, he came up to me and said “____ said you liked me” and then the bell rang and he walked away. I’m so confused because that was super ballsy and I don’t know what to do since I have like 5 classes with his ex girlfriend and she keeps shooting me dirty looks. Any ideas?

Update: He is now dating the girl who talked a bunch of shit on me and pretended to be my friend last year. Fun times.