Do you say something here?

[gamblore99]

One of my best friends has been dating a girl for over 2 years now. He is 22, she is 23. Its his first relationship. The guy is not the best looking and has trouble getting girls. The girl used to be acceptable, about a 6, but has gained like 50 pounds while they have been dating. She also has no friends, a family that is terrible, and OCD. She also wants to move in with him, and get married soon.

Whenever his relationship comes up, and we ask him whats up, will they get married or move in, he says "well its the next logical step..." and sounds very defeated. It seems like he is not really happy with the relationship.

Me, and his other close friends all think this relationship should not be moving forward anytime soon, but we're not sure if its our place to say anything. Should we just continue to keep our mouths shut, while our friend continues down this very depressing road?