If you go on punting, the chances are that at some point you will become too fond of a particular girl. It happens to a lot of us, and there is no easy answer.
Well actually there is. STOP SEEING HER.
Whatever your feelings for her you can be sure they are not reciprocated, and if you can’t control them, get out. And tell her why, as once she knows how you feel the chances are she will stop seeing you. That sort of attachment can make life far too complicated for her.