Which way do I feel? Which way do I feel?

For ten years now I have not had my my kids living with me due to a very needed divorce from my ex. For the last 8 their mother took them with her to Missouri. Doing this limited me to only being able to see my kids three times a year. My she has tried to send our son to us a few times in the past (only when he gives her attitude) but has always refused to even think of my daughter leaving her side. Because I have always felt that the kids need each other I have never taken her up on it. My son is now 14 and is of legal age to decide where he wants to live but my daughter is only 10.

Recently my wife and I have decided that it was unfair to make my son wait until his sister is 14 ( he will already be graduating high school and on his way to college by then). We have decided to offer my son the option to come here without his sister. He is both excited and upset at the same time and so am I. The idea of having my son here, being able to do more things with him, having a better chance at shaping him as a person, going to his games etc is something I have been praying for since the day I had to let them go. However, the idea of leaving my little girl there by herself with their mother and away from her brother (except for her visits) makes me feel like a selfish peice of crap father. It bothers my son as well. We both know that a big part of her wants to come too but she has zero legal say yet and she would miss her mom a whole lot. Living with her mom and only visiting me is all she has ever known because she was only months old when I decided I couldn't be married to her mom anymore. My emotions are sooo back and forth on this.

There has not been any final decisions yet so please say some prayers for this crazy situation.