Delete you out of Facebook, I wouldn't do it. Because I never delete who out of Facebook, despite the known or unknown. If you don't want to talk to me, I will not bother you anymore.
"I can see you that, you are not the serious type in this relationship?"
This phrase your hurt my feelings!!... I'm really sorry you think so!
I don't know, why you feel that way. But I want to tell you, I'm serious about everything that comes into my life. You believe it or not, it's up to you.