I bet you think about me
I bet you think about me is a swiftie's way of saying they're the best. It means they force their friend to see Taylor Swift every day and they brag about it like they're winning.
I bet you think about me. I'm better than you at Taylor Swift.
You think about me? I bet you think about me more than you think about yourself.
I bet you think about me. You know I'm the best.