Cold approaches on Mormon girls are challenging. I grew up believing that when, where, and by what authority I was married were equally important to whom I married. Unless you have some super amazing other dating prospect there isn't a huge reason to cut this relationship off now.
Do you see yourself marrying this person if marriage is something you are interested in for the future.
I remember being at some random party in university, holding a beer and looking at the throngs of people around me who were drunk and stumbling.