Adults can make friends with anyone

Someone is able to make friends with other people because his personal ego may override. Putting aside personal ego is one of the abilities of adults. It means people can be friends with whoever shows himself has grown.

Adult age alone is not a question. But it is also about the ability to recognise themselves and other people. A small child can enter the adult category if it has the capability. So don't judge people from the age of course Yes.