Why girls don't approach me anymore?

Girls used to always approach me but I used to never approach them. Girls used to always have conversations with me, I don't even have to put the efforts to keep the conversations going, I also used to leave they texts open so many times. But now when I decided to approach girls, I'm the one to keep the conversations going and when I compliment them it felt like they don't give a shit cause they get this all the time. Should I be like I was before?
Why girls don't approach me anymore?
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