Loss in a crowd of no return

So losing things is never fun whether its a person, object, job; anything losing things blows. losing usually implicates that you didnt want it to go or it was important to you, i would think if it wasnt as important something like gone or other words would be used to describe. currently in this case i want to talk about loss of a friend, a best friend, with a loss friendship in general. it makes me feel pretty empty that something like this has happened, but if comes down to this, i ask what i could do, and it was nothing, so i guess all good things must come to an end sooner or later. what can you do, life moves fast, just try to be nicer to everyone each day, and try to grow as a person, not forgeting people just because their no longer with us, or somewhere. im trying to do such things and i hope it will eventually work, i can be a kind not rude. and just be better and stronger because cry wont get you anywhere.