Continue trying or give up?

Okay so I'm 17 and I really like this girl and have for awhile. Her bestfriend told me that she also liked me back, a day or so later I confronted her about and she said she did like me but the feelings were just starting to form. So I waited a couple weeks maybe even a month not quiet sure. I had her friend ask if she still liked me and her reply was "I'm having problems forming strong feelings but he has all the good qualities in a guy (Loyal and having respect)" I asked her later on that night and got the same answer as she gave her friend. I told her that she would have to give me a chance in a relationship for strong feelings to form and if she didn't then I don't think they would. She said she only dates people if she has strong feelings for them. If she doesn't give me the chance how do I show her? Also in another conversation she said "now isn't the time but you never know about in the future.".Should I just give up and stop waiting around for something that may never be even though I really like her?

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