best friend
Someone you meet and become instant friends with on the first day of college. You become close and are good friends. You know he is your best friend because you would take the bullet for him.

Then, eleven years later, he gets whipped and calls you to tell you the friendship is over while his girlfriend goes apeshit in the background.
Manny used to be my best friend, then his girlfriend Latrina told him we couldn't be friends anymore, so we're not.