Outside of murder, mental illness, and drug addiction, family is forever. Friends however, renew their contract about once a year which is usually how often you have a really big fight. I just said a permanent goodbye to my pal of 35 years, Steve. You will do the same with your closest friends. Sometimes you cancel your friend plan after the first year. Sometimes you renew the contract for decades. It will eventually end, especially if one of you has a family and the other doesn't. If it's permanence you're looking for (and you are) start a family.