Don't be flattered that he misses you. He should miss you. You are deeply missable. However, he's still the same person who just broke up with you. Remember, the only reason he can miss you is because he's choosing, every day, not to be with you.
He's Just Not That Into You: The No-Excuses Truth to Understanding Guys (ed. Simon and Schuster, 2007) - ISBN: 9781416948674