talk to him first. I do that with my friends that are girls. I am in a commited relationship and I am very much in love, but I do use that I love you babe to my close lady friends. Talk to him and find out what is his response.
Is he Mexican American? you said Tia which means aunt and Idk maybe he talks to his aunt like that maybe he doesn't but still if you have any doubts dump him or confront him. He ought to man up if he has the balls to say that in cyberspace Hehe