Dear Abby: My life is stuck because I’m still in love with a woman who married someone else

Dear Abby: I am in love with a married woman. I was in love with her many years ago. Before she was married, she knew I was in love with her, but she lied to me and led me on. Despite knowing how I felt about her, she got married, leaving me devastated. Now, many years later, I am still in mourning and haunted by “what if?” I know I can never move on from her, and it seems like things will never change. So what do I do?