It is true that the lives of your friends may be short-lived.

[ like durin. and disa. dwarves live long lives, but they are not as long-lived as the elves. and there are pitfalls to a long life, as elrond had demonstrated in their friendship.

hopefully he has learned better. and will keep those lessons at heart. ]

But then why would you not make new friends? The memory of old friends may be bittersweet, but why lean towards the bitter? I'm sure any friend you make would want you to enjoy life as you know it. And lean towards the sweet.