Do sprawdzenia!

Czesc, moglby mi ktoś sprawdzić list i poprawić błędy?

Dear Kevin,
Thank you for your letter which I received a few days ago. I was sorry to hear from your letter of you're worried because you have not friends in your new neighbourhood. I do hope that the matters you mentioned shall turn out for the best.
Why don't you go to the disco. When you enjoy yourself you can find new friends easily. The best thing to do is can give a party in your house and invite your neighbour. You never know whether that next door man isn't as lonely as you are. You bet that among all these people you'll find the ones that suit you.
I know it's hard to do at first, but belive me it will work! I wish you good luck! Please write and give us all the news.

Your sincerely / Take care

X Y Z

gonia-
nie pisz tego samego w 2ch watkach, bo NIKT ci nie pomoze.

I was sorry to hear from your letter 'of you're worried' (nie, nie tak...THAT you are worried) because you DO NOT have 'not' (niepotr) friends in your new neighbourhood.
Why don't you go to 'the' A disco.
The best thing to do 'is can give' (co tu nie tak- popraw) a party in your house and invite your neighbour.
'You bet' (zmien to) that among all these people you'll find the ones that suit you.
I know it's hard to do at first, but 'belive' (ortog) me it will work!
Please write and give 'us' (ale ten list to tylko od ciebie, nie od 'nas') all the news.
'YourS sincerely' 9to troche za formalnie jak do kolegi) / Take care

>I was sorry to hear from your ...
I AM sorry to ...unless you were only sorry at the time of reading Kevin's letter. /tylko sugestia/
Why don't you go ...?