2 Works in Jack and Jill - Louisa May Alcott
Jack learns of his feelings for a Jane who has always been slated for him, and Jill takes a little while longer to realize it. Honestly, it's just a brief piece that includes a little more. I may do another about the actual wedding/proposal, but this is my favorite book and I felt a little gypped by the ending :)
Jack is always eager to lend a friend a hand any way he can.