I want to turn back the hurt is too much
I want you to be close again, back in my touch.
What did I do wrong? Wasn't I enough?

....Great introduction here. Its like you want to reverse time and make things as they were before all this hurt you are having now. Then you pull us into the poem by asking a question whether you weren't good enough. I would only suggest you put a comma between 'back and the' so that it flows even better

I am weak without you even though I act tough.
I am drowning in my own depression.
Without you I am just an empty tin.

...you realize the value the person had in your life, that without them, you are nothing. You can put on a smile or laugh but you are hurting inside and its killing you, great flow of emotions here.

I don't think there is a cure.
But the thing is I don't miss you
I miss the person I thought you were

...You acknowledge there is nothing you can do to heal yourself. I must say, i really liked the ending, i thought it was really creative that you don't miss the person but what you thought he was coz maybe he lived double lives with you. Great work on this one.

I think everyone has been through these feelings at least once.
:) Enjoyed.