One Way Mirror
Someone becomes a "One Way Mirror" when they are attempting to form a relationship with someone, but is the only one individual is interested in bonding. This leads to very one-sided relationships where one person knows a lot about the other, but it can't be said vice-versa.
Person 1 :Jack is being a total One Way Mirror, he won't leave me alone & keeps asking me all these questions. He knows so much about me, but I don't even know what classes he's taking.
Person 2: What a creep, can't he take a hint?
Person 2: What a creep, can't he take a hint?
One way mirror relationship
When 2 people are in a relationship, but only one loves the other. The unloved one is unaware of it and continues to believe that both feel Equal about each other.
"I think I'm going to break up with Zeke. We just have a one way mirror relationship, you know?"