DEAR ABBY: I recently started a romantic relationship with “Doug,” a guy I have been chasing for a while. My friend “Cassie” helped to set us up, and I am grateful. Doug and I talk every night and are very close.
Cassie has a reputation for being a flirt, but I didn’t think much of it. As the months have progressed, I notice her talking to my boyfriend more often. I’m OK with her being friendly, bu…