Исправьте,.если что-то не правильно) и дополнить прощание с другом it was four incredible weeks of a lot of interesting lessons,adventures. i've got acquainted with a lot of wonderful persons who i'll never forget. and of course i hope that i'll meet each of you in the future

There were four incredible weeks full of a lot of interesting lessons and adventures. I've got acquainted with plenty wonderful persons who I can never forget. And, of course, I hope that we'll meet each other in the future. I wish you were happy and once more thanks fo everything, my dear friend.
With love,
Irina