Most Helpful Girl
I don’t 100% know the story or relationship between you and this guy. But it seems like you care about him, and if he’s acting weird then maybe he needs some support. Think about messaging him something supportive and sincere. But if he just had an engagement fall through, make it seem like you are just a friend who wants to make sure he is ok. He may not want any romantic feelings right now, try to think of what’s best for him.
If he isn’t responsive than that means he probably wants his space. Men usually like more distance when in a tough spot. He might just need time.