Saying no to a girl

[Zhukov]

I am guessing that a girl that says things like: "I am lonely" "I need a boyfriend" "Why don't you have a girlfriend?" "You would be a great boyfriend" "We have so much in common" "I just need a nice guy in my life" "you are such a nice guy" and laughs at all my lame jokes and compliments me on every idiot thing I do wants to be my girlfriend or something. I think I am right.

I really like her as a friend, and it seems to annoy her when I play dumb to the hints that she drops. I don't want to have to keep dodging all the time, but I don't want to be mean or sound like I am too good for her or something.

What is a good way to word "I don't want you as a girlfriend" ?

Don't just say "I don't want you as a girlfriend" because that is too harsh.