How to get over someones looks

Been talking to a girl recently, met her at an airport, I didn’t notice her much but we exchanged Instagram and since then we are dating but I don’t find her that much attractive (I don’t really want to say this because I really disgust that Im caring about someone’s looks) but she is in deeply love with me idk what to do if I should continue dating her or not. Just thinking about leaving her makes me very sad, is there any way I can work this relation out or how can I change my perspective please