What is a good song to play for a girl?

I am 13 and I like a girl and I was thinking about playing her a song on guitar /singing to her. The song can't be too sappy and romantic but it needs to get the message thru to her that I really like her. I was thinking wasting time by blink182 or m&ms by blink182. Listen to those and tell me if there good or suggest a different song :-) thx for reading