Husband and close female friend

Is it normal if my husband has a childhood family friend who he sees sometimes at family events, and tells her he loves her when she leaves? He did this in-front of me and also his family so I assume it was innocent. For me it’s just a little weird, I don’t say I love you to male friends I’ve known forever. He says it’s an I love you as a person kind of thing.

Is this weird or do I need to worry about this?