Translation of verhasst

Let's not forget how we started. We were writing each other very long messages and today we are both much more fluent in both languages. No book could have brought us that far. Cheers.
In plural there is no difference between the formal and the colloquial address form. Do you mean that you are using 3rd person singular form for the plural imperative? If so, I will change all entries so far.
No matter then. I wanted to study Spanish for years now, because you know, it really helps? And how long have you been learning Spanish? Please write me soon. Best wishes. Your Alfi.