I'm going to reject a girl I liked in the past.
Did she do something to change your opinion about her?
I don't like her anymore after I heard she was playing games with my emotions
If you can trust the source of the information, it's probably best. People don't always reciprocate our feelings.
She didn't give me the time of day and called me a creep.
I understand how upsetting that is. You should take it in stride and be with someone who likes you for who you are.