[sakaeyellow]

It was nice knowing you, and hope you do well in Toronto.. We will miss you and please come and visit us when you have time.. I know i was really crazy and annoying!! lol... BUT I WILL REALLY MISS YOU

In this situation, it is more natural to call your friend by his/ her first name, so in the letter I will assume that your friend is a boy called 健二

健二に出会ってよかった。トロントにもお元気に。健二 のことは忘れないよ。暇があればまた来てね。いつもご 面倒をおかけしてすみませんが、決して忘れないよ、健 二のこと。