Issue here is I think you guys should be friends. Connect emotionally not sexually = friends. It’s not fair to her especially if she is attracted to you. I’ve been in your shoes before not as extreme but I would sometimes think about someone else to get off because I simply didn’t find him that physically attractive despite really liking him as a person. It’s not sustainable because as soon as he wanted to commit everyone that had what he lacked became more appealing to me to the point where I knew I would ruin any potential serious relationship with him by chasing my physical type. But now I’ve got someone I’m physically attracted to but lacks what he did emotionally it’s really difficult thing to find both that’s why when you have it you cherish it.