Should I let her go?

I have been with my girl friend for 5 years we have had our ups and downs I have moved out for 3 months and have been split for 4 months. I told her I don't love her I don't know how I feel really.

now I want her back and she says she has moved on I don't want her to fell any more pain she has told me not to try to get back.

I have my own problems that have got me were I am she says I am cold and don't show her any feelings. I don't talk to her about how I feel. Should I move on
Should I let her go?
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