Dear Annie: I’ve been dating “Don” for eight months. When I met him, I didn’t realize he had been seeing a woman for two years. Apparently, they had an understanding that if someone else came along, it would be OK to break up because they live three hours apart. They still communicate on Facebook.

This girlfriend’s family owns some property that is pretty much in Don’s backyard. She stays at a cabin on the property a few times a year. It makes me really uncomfortable. But when I talk to Don about her, he says, “You have nothing to worry about.” But there have been a few nights when he’s called her name in his sleep. He also once told me that if he wanted her back, all he had to do was call her.

Don wants me to move in with him, but I can’t. His relationship with the other woman eats at me all the time. What do I do? – On the Rebound

Dear Rebound: You don’t completely trust Don, partly because he has given you the impression that this woman is always available to him. Trust is the bedrock of any relationship. If it doesn’t exist with Don, there won’t be a happy future for the two of you, and you should move on.

Dear Annie: A reader asked why there wasn’t a Viagra-type pill for women, and your response implied that Viagra restores desire. This simply is not the case.

Viagra and other medications like it allow the body to carry through on the desires of the heart and mind. In the absence of desire, these medications do nothing except possibly give a confidence boost. – My Two Cents

Annie’s Mailbox is written by Kathy Mitchell and Marcy Sugar, longtime editors of the Ann Landers column. Please email your questions to anniesmailboxcomcast.net, or write to: Annie’s Mailbox, c/o Creators Syndicate, 737 3rd Street, Hermosa Beach, CA 90254.