Это тоже мой закадычный друг, с кот

Это тоже мой закадычный друг, с которым мы дружим с третьего курса университета.
Мы учились на одном факультете. С ним мы дружим уже 5-6 лет.

Результаты (английский) 1:

That's also my bosom friend with whom we are friends with the third course of the University. We learned in one faculty. With him we are friends already 5-6 years.

Результаты (английский) 2:

This is also my bosom friend, with whom we have been friends since the third year at the university.
We studied at one faculty. With him, we've been friends for 5-6 years.

Результаты (английский) 3:

it"s my sidekick, with whom we"ve been friends since the third grade of the university.we were in the same department. with him, we"ve been friends for five or six years.