Newly re-married Father?

I am 47 years old and I have a16 y/o daughter & a 19 y/o son. My son lived with me and my daughter lived with her mother. I re-married a year ago and moved about 45 minutes away. My son did not want to come with me and moved in with his mother. I have a tremendous amount of guilt daily because I have done this. I love my wife and her girls but I feel like I have made a mistake. I am a Christian and have talked to God daily about it and have given it to him. I should trust him and know that he will work all things for his glory but the guilt just doesn't go away. When my son was living with me he wasn't home a whole lot because he is a teenager and he wants to be out with his friends and when my daughter would come over she would want to do things with her friends as well. I talked to all of my family about this before I married but this guilt stays with me every single day. I have always frowned upon Fathers that just left their children and families and did their own thing, now it feels like what I have done. I do see my kids every week and talk to them daily but I feel guilty living with someone else's children and my own flesh and blood not being with me. I guess this is more of a vent than a question. Anything you could add would be appreciated. Thanks.