SHOULD I GIVE UP?

I am a 30 yr old male who has recently seperated with my wife of 6 yrs and the mother of my two boys ages 4 & 1. This is still a very terrible shock to me . we have been together for 12 yrs total. One day after questioning her about an outragous cell phone bill and catching her in a couple of lies she took my kids and stayed at 3 different motels over 2 weeks. MEANWHILE ive offered to stay with my parents and let her stay in the family home, and not waste all that money off her credit card on motel rooms.She agreed so i told my parents everything so they would let me stay for a while till things got better. Keep in mind my wife stays with my kids,and i do mechanic work out of my shop beside my house.Well time come for her to come home and she did'nt . Instead she acted like i should not be back at the house unless she inviited me. Well i told her i would find anouther job, but i needed to finish up the ones i had already committed to. She got pissed off and said things wouldn't change and not to call her or nothing. She then issued a tpo against me that states im not to communicate with her by any means and cant see my kids either.The tpo was a bunch of b.s. so she could get temporary custody of our children. I have done everything i can to keep my family together , BUT for some reason she acts as if she had never cared for me at all ,I mean just as cold as ice very hateful. nNow she has rented a place ,bought furniture,appl.,and just blowing money like its going out of style.I've begged her to come home and told her Ilover her and the kids.she has played numerous head games torturing me.should Ijust give up on us and saving my family or what? WHY is she doing this to me and my boys?I'm devastated, did i mention the money shes blowing is on her credit card that ive been busting my butt to pay off.