I need everyones individual opinion on the meaning of "Day by Day" for a relationship?

I think I might of screwed things up recently with this girl whom I revealed to her that I like her and have feelings for her and she has the same feelings for me. But when i told her lets take things slow by going "Day by Day" she got to asking me what I meant by that. I had always thought that if we rushed into things quickly everything would be messed up. Since that time shes been going quiet and has been avoiding my calls...I've come into contact recently and she mentioned something about "I'm Waiting" and "I was wondering why you never answer me" in her text messages.. but shes been distant never the less...I dont regret ever telling her how i felt about her, but i do regret ever mentioning the phrase "day by day" as I'm thinking she might now be playing hard to get or making me wait for that dumb mistake of mine...communicating her is hard now, I'm afraid of calling cuz she wont answer and shes stated she never checks her voice mails...We still have plans to hang out at a halloween party and concert in the next two months, so i think we're ok, but I just want clarity between us...I DO WANT TO BE WITH HER!!