It could mean multiple things. I am a guy myself and am very sarcastic so it could be sarcasm. It could mean he likes you or is is saying it for fun. If you want to know exactly go to the guy and ask him.
well the answer is all in the saying! it simply means he is amazing.
He no longer wishes to be in a romantic relationship with you, or he doesn't want to start one, but he doesn't want you to think he's an a**hole.
If a guy tells his friends that his girlfriend is quality, he means that she is a great girlfriend.
When a guy tells you he feels a pit in his chest, he means that he has a chest pain.
She does not like him
Ejaculation
When a guy tells you he found the key to your heart it means he wants to be with you forever; he is the one for you
It Means he want to be your boyfriend!
That he likes you?
He inviting you to have sex with him.
It means he tells lies
that you look good.