...If she really wants out of the marriage and there is no chance in getting her back, it's really time for you to take inventory of your life (it's probably been a while) and start determining what you want in your life. Don't be afraid to ask for whatever you want - you're allowed, it's your life.
Even if she changes her mind and doesn't want out of the marriage, it still is time for you to take a hold of your life and start doing for you. It's not a bad thing to be selfish if you aren't doing it at the expense of others. Your life is important, time for you to believe this and make it so.