So there's a girl in one of my classes that I had a crush on. I talked to her a few times but found out she had a boyfriend and stopped. She stopped showing up to school for a few months and I put the whole thing behind me. But when she came back and I noticed that she always stares at me. Like the other day when I was sitting in the lunch room, she kept staring at me from across the room. She's still with her boyfriend but she keeps staring at me. What does this mean?