This is absolutely beautiful. It's interesting to look at, and it's enchanting as well. The soft purple glow on just about everything (excluding the moon) is a nice touch, as are the floating pink hearts in the background. It gives the picture the illusion of two kitties in love in such a perfect way. In fact it reminds me quite a bit of the scene from The Aristocats, so I applaud you for capturing the magic of that part.
Lovely work on the pink bow around the white cat's neck, by the way. And while I love the whole picture, I can't deny I quite enjoy the white cat the best. It's the eyes, I think, or the way it's positioned... Either way, I find it's absolutely adorable and I wish I could take it home with me.
All and all, this is a great piece of work, and you should be very proud.