Do girls ever regret it?

I was with a girl about a year ago and we were basically best friends we would text every day and eventually the girl liked me as well and we dated for just a month and she dumped me for no reason I treated her like a queen and always respected her and for a year straight I was trying to get her back but now she is with another guy who she says is also loving and caring to her and I called her out and said you never liked me you just used me and she tells me that's not true and you know it...

Is it safe to say she really did use me and will she ever regret breaking up with a sweet loving caring guy like me?
Do girls ever regret it?
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