There is one guy who has hurt me. He told me that he likes another girl. He also sings this song about her but he always is showing mixed signs I don't really know how he feels for me?

Get away from this guy. He's only showing "mixed" signs to keep you hanging around for easy pickins. If he hurt you once, and you came back, do you really think he will hesitate to hurt you again. Why shouldn't he hurt you? He knows you'll come back. Get away from this guy now.