Boyfriend showing me off of? Otherwise please help?

Ok so I've been talking alot to my boyfriends best friend Adam who's dating his sister and Adam told me that my boyfriends been talking about asking me to marry him for awhile now and he said that when he's in front of girls he always talks about how I'm his and that he's taken is this his weird way of showing how much he loves me? He's in a band so I constantly worry about groupies does it seem like he's showing me off for a certin reason or ? Please exsplain