'Love Potions ostensibly cause the drinker to fall in love with the person who gave them the potion. However, true love cannot be produced through artificial means, and thus the feelings that Love Potions create are more like obsession than affection.'
I loved Ron's reaction to the love potion that was intended for Harry. I was crying laughing in both the book and film. Rupert Grint did such an amazing job at acting that out. A cruel but absolutely hysterical potion, it's one of my most memorable moments in the series.
Ron: "It's no joke! I'm in love with her!"
Harry: "Alright, fine, you're in love with her! Have you ever actually met her?"
Ron: "No. Can you introduce me?"