Hey, newbie33, and welcome to Psych Central! Have you suggested joint counseling to her? If not, then I suggest you do. If she doesn't want to, then you might go yourself.
But, although I know she is the mother of your child, I don't think you should just put your life on hold unless she agrees that this separation is a trial one--and that she might return before too long. And then I suggest you two agree on how long to stay separated. I wouldn't make it over a couple of months, since as I say, you are putting your life on hold.
Plus, you two were in a close relationship very early in your lives, and people do change a lot during that time.
My opinion, anyway.