Are these signs that he's been depressed/sad?

I was dating this guy for a little while and we had to break it up for really unfair reasons (long story) but we definitely had a connection and lots of chemistry. Well, I haven't seen or heard from him in a couple of months and he was recently tagged in pics looking like he's gained weight and is now growing a goatee...just looking very different from before. He's also never smiling in his profile pictures. And one of his friends wrote "Smile!!! We love you :))" on his facebook wall.