Hey, that's not bad! You came up with a pretty nice poem, as a whole. 

I'm going to go through this stanza by stanza. Comments are in bold.

I miss the days we used to laugh   Good line

And the jokes we used to make  I would take out the and.

I miss the smiles we used to share    Pretty good line

Memories time cannot take  I'm not fond of this line. It's a good line in and of itself, but it doesn't really gel with the rest of the stanza. Maybe ache would make a better rhyme - you're talking about missing her, after all. My rhyming dictionary also suggests clambake.

But life has turned us in different paths  I would reword this. Maybe just "but we have turned in different paths."

I hadn't seen you for so long  I don't like this line, but I don't know how to change it.  "So long" is a weak phrase, except when it means "bye."As in "so long, and thanks for all the fish." 

And I hope the day that I come back  Pretty good line

Our friendship will be just as strong  All right, I guess. "Just as" seems weak to me. Perhaps tweak this to mean something about rebuilding a strong friendship.

Looking at you, you've changed so much

Like you've been playing in a rougher crowd   Good line

But talking to you, you seem the same

Never hurtful, rude, or proud  Feels awkward and forced, and no one is just the same after years. I'm not sure I believe you here. :P I have found that after a long time, there seems to be a barrier between me and the other person. You could use the rhyme "shroud," describing the difficulty of talking to them that time has placed between you if that's the case.

I hope you haven't forgotten about me   I would remove about. It's unnecessary and doesn't flow well

In the time I've been away    Pretty good line

And I hope that we will meet again soon 

In some later day  Soon and then later.... I don't like that. Rephrase that last line, maybe.

Until then, I hope you'll remember me   You used hope just two lines ago. Maybe make this line imperative instead of declarative. "Remember me - or else." :D

And maybe in the end  Decent line

After all this time of worry and wait

That I will still be your friend  I would remove that. Good line, otherwise.

Cheers!

-EH

Come on. No one else?

It was a very good poem.  I wish I had a friend like that...

I think that poem is great and about real things real people can relate to.  Keep writing, your poems are great! 

It's a great poem!  Just a couple things, sorry if Emily H already critiqued you on these.  The line: "In some later day," is a bit awkward.  I'm not sure how to change it, but these words seem to clash. (If you get my drift...)  In the line before that, "And I hope we will meet again soon," the soon add's an extra syllable that throws off the rhythm a bit.  If you take out the 'soon', I think it would sound better. 

Great job rhyming!!  I've never been able to rhyme succesfully, so I admire people who can.  So great job with this.  Hope you and your friend will be close again!

~Leaf