What does it mean when a guys cousin calls you his suga pie?

ok so i like this guy right...and we went to a movie with some of his friends....after the movie we were hanging out and taking pictures and in the one i took with the guy i like (lets call him brad) well brad had his arm around me and i had my arm around him...but we wee recreating a statue that was in the picture....well the picture is now on facebook right and two of brads famil member commented on it (i think theyre his family at least) and on just said how cute and cool and fun it looked.....but the other person put "awe my little cuzzin and his little suga pie.u 2 look like ur having a blast.NICE!" word for word.....what does that mean...cuz im a bit confused....o and ps brad likes me back....