I loved "A Walk to Remember" as well. It's not a happy ending but it is a feel good movie and to me, a great example of how love can really change someone's life for the better - even if you lose that love.
Oh, and "The Illusionist", a friend recommended it to me and at first I wasn't sure about it. But I loved the mystery in it, how I couldn't exactly predict what was going to happen and I loved how it all played out for the best of the lovers. I love happy endings.