My boyfriend has been staring at the same girl before and during our relationship. He has admitted she is pretty before. He might have had a crush on her but I don’t know if he still does? His friends still sometimes point her out to him and look at her as well. His best friend was trying to get him to ask her out for months before our relationship but he never had enough guts to. Should I be concerned about this? Is this a sign he is interested in her?