How do I get over husband leaving for younger woman?

My husband filed for divorce last week and I am still devastated. I am 38 and he is 43. We have been married for almost 15 years. Basically he is divorcing me so he can marry this little floozy he has been banging the past year. She is only 23 years old and completely infatuated with him because he makes a lot of money and looks really good for a guy his age. I, however, feel like an old toy that has been thrown away. Is there any way to get over this? How do you deal with a man who dumps the "love of his life" to be with some perky little slut?