Wait, so she actually DOES like the guy and wasn't just trying to create a rift, or does she like the girl? I'm inclined to think it's the former because of that hug.
The yankee guy would not hesitate to steal a love interest by any means even if he's not really interested in momo? He even confessed his wrongdoings
He declared himself casually as a villain.
If really you are not interested in a romantic way to someone you "can" try to get to know each other better a few times and explain why, but in his case he is used to prey on girls...