How long does emotional attachment last when the person is not your girlfriend but you were romantically bond and emotional attached too?

There is a girl whom i cared for and loved dearly, we were connected, we hang out , we kiss, we hold hands, but we never got to the part of dating, things did'nt end well, she blocked me, i wanted to move, so how long does emotional attachment last, it has been 5 months now and i still miss her, but can't talk to her anymore, do you think she had moved on too and detached herself from me that easily?

How long does emotional attachment last when the person is not your girlfriend but you were romantically bond and emotional attached too?
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