All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
You have to repel this deviant feeling and keep away from all the reasons that may lead to it or help in it, even if it is looking (at her).
You should seek the help of Allah and supplicate Him as much as possible to ward off this evil from you.
Allah knows best.