Is he a mama's boy??

My BF is 39 years old and still has a room at his moms, which he frequents. When things don't go his way....he runs to his moms house. He can't hold a job, can't pay his own vechile payment and doesn't tak responsibility for his own actions. He'll come and stay with me,and isn't shy about getting me to go out and pay his way. He has temper tantrums when people don't agree with the way HE sees things. No matter what the conversation is about, he can and will turn it into something about himself. In his past relationships, it's been the same story. ( I have spoke to several of his ex's since he chooses to try to stay in contact with him and they have all told me basically the same thing) I feel like he is trying to find his mother in a woman. Someone who will take care of him and apease his childish outlook on life. Is he a mama's boy? Is it ever possible at age 39, that he will still grow up?? He still brags about how much beer/alcohol he can drink like it's some olympic sport. Crazy.