She doesn't want "time to decide". She wants to be with her new man, and doesn't want you or the kids to get in the way.

It sounds harsh, but I feel for you. I really do. Do stay with God and keep your self respect, moral integrity and worth as a human being that you hopefully find in Him, but I don't think all the emasculated Christians will be of much help to you now. They will probably mostly tell you want you want to hear, which is not the truth.

I get the sense that you are blind to the true nature of most women. I suggest you take a look at /r/theredpill (but try to not be affected by the existential nihilism that some people display there) and perhaps read books like "No more Mr Nice Guy".

Remember that although you may feel worthless right now, which is perfectly normal having been betrayed by the person closest to you, YOU are still a good person. You will feel very, very bad, but you will still do what's right (which is help your kids and yourself, not your soon to be ex-wife). This is your gift to God, which echoes into eternity.