the missing piece in your jigsaw puzzle

Getting married is a happy thing. It's like you have finally found the missing piece in your jigsaw puzzle. Heard the good news and I am happy for the friend. =)

但我最关心的还是那位朋友的好朋友。
希望现在的他是幸福的。
也希望现在的他是比从前还要快乐很多。
这份关心永远不会改变。=)