Isn't it more than what he hoped for ??

So the line immediately before that the other guy who had a thing for Stefan/Steve Urkel's crush Laura was telling Stefan to just move on and let go. After Stefan replied with this, the other guy started to square up for a fight. Why did this line piss him off so much? I've racked my brains and I'm only able to take it at face value to mean that he would let the other guy know if he ever let Laura go. Is there a deeper/double meaning behind this?

Whaaatt??? Where is this from

PEEEETTAA I'm confused

Who is this

im doing bridging work for applied science and im stuck on this part. Help me petahhhhhh 😩