Allison Cameron used to have a crush on House. It interfered with her work on his team, but after she resigned that post on the finale of season thee, Cameron gave in to her developing feelings for Chase. They got married to close season five.
Prior to that relationship, Cameron actually married a man that only had a few months to live, due to cancer. She's an overly sensitive, caring individual. She now works in the ER.
Chase: Did you ever love me?!?
Cameron: I don't know.
Chase: Thank you for finally telling me.
Dr. Cameron: So, a woman can't express her interest in sex without it being some professional power play?
House: No. If you look the way you do and you say what you said, you have to be aware of the effect that it's going to have on men.