Sad happy songs?

Why are sad songs synonymous with happy memories? I haven't the slightest clue, but I am finding that Lara Fabian's Je Suis Malade, and Je t'aime make me feel better. They are sad songs, very good ones too, but they remind me of a summer which was so perfect. And I HATE summer with all my might. But it must have been a hell of a good summer for these songs to evoke something special and make me smile. I don't think that it was Fabian's intention for people to listen to her and smile. I think she wanted them to cry. But then maybe I've cried too many buckets already. It's not even a silly idiotic grin that I have on me right now (Yes with Lara Fabian in the background), it's a knowing smile. And a wealth of happy memories; memories of one breathtakingly (literally) beautiful love story.To the world it might seem all wrong; to me it looks like it's very close to perfect. Even Fabian's Adagio, stolen unashamedly from Albinoni himself makes me feel quite happy. And I always thought that Mr Tommaso's composition was meant to be sacred and he must have at least expected some reverence. It's making this girl here quite serene. So maybe I need more sad songs to make me happy? Perhaps it's the very word happy which I have misunderstood for all of my life. Happy doesn't necesserarily mean hysterical laughter, at least not for me. It means that I can take a deep breath and feel comfortable. And it works for me, probably the opposite way it was intended. Well... if it works, who am I to complain?