I don't know what to do...please help!

Alright ladies I have a problem. I went to the hospital about a month ago or so and I saw this nurse. She was stunningly beautiful. Ever since then, I can't get her out of my head. My husband knows I always think about her and he likes it, but I really don't want to, but I can't stop...if that makes sense. I just want to get over her. I don't know what to do. Sometimes my husband tells me to think about her during sex. Have any of you ladies ever been in this situation and got over it? If so, please tell me how. Please no judging.