Buddies White Trash GF

[Golden_Rhino]

Hey guys. Got a problem I've been working on, and after a few days it hit me that the OOT is the best place to go for help. My best friend for 25 years has been dating a girl for a few months now. Problem is that she is total white trash. Within minutes of meeting her for the first time she was burping and farting. She also drains my buddies bank account as she never pays for a thing when they go out. The worst part is that he is also changing. He used to be a pretty classy guy, now he is becoming like her. If she was just a bang, hey more power to him, but he is talking marriage. I just don't know if I should say anything, and if so, what??

Any help would be great.