Hey, jwilkins, welcome to the forums, and I'm sorry about the pain you're feeling right now around your separation.
If you're interested, there's a book you may find helpful called "
How to Mend your Broken Heart, which is good for releasing the attachment you feel. Even if you want to hold onto hope that you can heal your marriage, it can be very helpful to let go of the attachment -- do you know what I mean by that? Like, the feeling that something is wrong if it doesn't happen, or like you won't be happy, satisfied, or fulfilled unless it does. There are some nice, helpful techniques you can do for yourself to feel better -- more powerful and self-possessed, and like you have more authentic
choice about how your life goes and making sure your daughter has everything she needs, rather than feeling like you're at the mercy of what happens, or of what
he does.
Best wishes to you during this tough time.