My (Im 23 female) bf (also 23) has a female friends that he has known for years (which is fine I have no issue with him having friends). However, there are things that bother me. When he hangs out with her, its always alone never in a group. Coffee, getting food, golfing/other activities together just the two of them. She 'hearts' all of his facebook posts. And before we started dating, he put up a couple of pictures of the two of them (part of a random assortment of pictures for an album) and she comments with some emoji/sticker of a thing with heart eyes and some lovey looking stuff. He responds with something else. (He told me recently that was a display of "single closeness" towards a friend). To his credit he has not done that again. On top of that, she is the ONLY friend of his that