How can I get the girl I lost to see me differently as a person after 4 months of being broken up and I'm blocked on everything?

I think she's also in a new relationship, but i love her with all heart and even though the breakup is my left and she left me ( didn't cheat) how can I get her to talk to me again
How can I get the girl I lost to see me differently as a person after 4 months of being broken up and I'm blocked on everything?
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