Translation - Russian-English - Любовные узы

This is too literal translation. Of course, I take into notice that the original text is not composed in good quality. I would suggest to render that letter as given below. As well, I ask you to review the original text, as in one place the recipient is called as friend ("друг", but at the end of the letter he is called "dear brother, buddy" ("братишка".

Last time you had written that you have problems with girlfriend, as she became cold to you. It is why I am about to give you some advice, my friend.
It is natural that these things happened, as you have already been together with Diana for 2 years. If you really are fond of her, you should let her go, be it for some time, not forever.
Believe me, if she really loves you, she will come back. If she doesn't, you have no reasons to worry about, as there will be many beautiful girls on your way Don't forget about me, buddy, please, write me more often.
We are looking forwards to seeing you again together with parents on vacation!

Hey Durklis
I was trying to be as authentic to the original as possible. Your translation is more "free" and you take the liberty to change the tone of writing, which I was trying to keep.
I honestly don't think it's our role as translators to intervene with the manner and character of the writing itself. Of course we must correct grammatical mistakes etc., but if someone writes with slang we should keep the same nature of this exact writing.
For example:
В прошлом письме ты написал
Is NOT
Last time you had written
But:
In the last letter you wrote

This is not taking it too literally. It is an exact authentic translation. And so on and on...

This is how I see professional translation. We must remain neutral and not intervene even when we think the quality of writing should be better.

Thank you