what to do on loss of a good friend?

well i have a friend that i had since we were born. and we played together throughout the years blah blah blah.... anyways, when we got old, we were into this problem and were like in the situation of an argument that went far. i mean it lead us to almost wanting to fight each other and stuff and we never talked no more. in easy words, we were not friends anymore. we only lasted like 2 weeks without being friends. when i had a long talk to my grandma she explained to me how im disappointing my grandpa (his and my grandpa were closest friends when they were in their early 40s) and i had to go look for my friend. i found him in this one place he didnt want me to find him, the place we both found and kept as a club when we were kids, in a coincidence we both were hungry and we talked in a fast food place and we got through all of our problems as we could. as we became friends again, i thought it wasnt going to be the same anymore with us as before. but i found out that we knew what to talk to our problems and we were still friends as we used to (nothing less, thanks to god).