My SO and i have been dating for over two years. We're in a happy relationship for the most part and we have a lot of fun together. He has this friend who lives in a different state who he talks to a lot and has told me that he thinks she's hot. i've talked to him about how uncomfortable it makes me and he'll stop for awhile and then hit her up again. He's done this with a few girls. what does this mean? should i be worried?