They buy stuff the girl did not request, make favors that weren't asked for, then get mad if the girl still don't give af about him. I'm sorry but it's their own fault for interpreting every little thing as a sign that she was interested in them. It looks like they project their own desire on the other person to the point they don't even seem to see them as actual people but just an object they want to get. Just because someone is friendly doesn't mean they want to date you, jeez that should be fucking obvious. It creates such an awkward situation that could have been avoided. If you can't be friends with someone without wanting to f*** them then tbh you shouldn't even interact with them in the first place!
Sorry if i sound too angry I'm just bothered about a situation at work