:hug: It's hard to have a rift like that in a friendship, and it's harder still when family members are involved.
The thing to do is to decide whether you want to salvage the firendship and repair the situation. Since you miss your friend and since you feel badly about what happened, maybe it's time to try to re-open communications--that means listening more than talking, and it may mean that you might hear some things you don't want to know. But if you can find it in yourself to forgive your friend and yourself for the problems that have come between you, then the friendship doesn't necessarily have to end.
(We do have a friendship thread around here somewhere...not sure where it is a the moment, though.)