When I read the first sentence, it reminded me about my two
threads in the past. Same content, same usage of words. Weird
seeing them again, but by a different person. 
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You haven't let go, because you're still thinking about her. Time
does not heal wounds, it only fades the pain.
The only way to pick
yourself up, is to get up on your own. No one can help you, if you
want to stay down.
Yes, you may think that it is worth it, but it isn't. Why hold on
to the past?
The past do not exist. What we perceive as the past, is
merely things which our brain recorded.
Don't be sad because you've lost her. Be happy because you know
you're one step closer to finding the other half of you.