When you ask a girl out and she says this what does it mean?

i think that mean you have chance..
cuz she did think about how it would be if you two were dating.
and she is afraid of losing you if you guys broke up, so this somewhat means she does want to see you around forever, which means you definitely stand a chance in my opinion.
she may not like you enough as a lover right now, but she has the possibility to develop further relationship with you.

She likes you but not in a romantic way. She enjoys being around you because she wants to remain your friend, but she may not be sexually attracted. She is already thinking of a break up and that is not good in a new relationship. I wouldn't say you have no chance because some good friends become lovers and marry. I think you should not attempt anymore romantic advances with her and if it bothers you to see her with other guys you should distance yourself from her.

Actually, she means what she says. I have said this to a guy friend before. What it meant for me was that I was not physically attracted to him, but I enjoyed him as a person. I enjoyed his friendship and humor, but I couldn't see a relationship beyond friends.

mainly what she is saying is that in the future when you both break up, it will be hard to be just friends again

she doesn't want to go out with just with you. The only way you can go out with her is with a bunch of friends. Don't get close to her either.