Run or stay?

I am in a long distance relationship (2 years), we have been married for 1 of those years.

My husband lives in the USA and I live in Canada.
We have plans for him to move to Canada as soon as immigration papers are done. He has 2 children ages 14 and 16. He was going to come see them every other weekend as in his original divorce agreement. There mother has refused to let them come live in Canada. They are not interested as well.

Now immigration papers are all done and now the daughter wants to come live with her dad full time. She claims mom and step dad is not nice to her. However, she doesn't want to move.

It puts my husband in a pickle because all of our plans have been put on hold for her and he does not want to uproot her from her friends and bother who has chosen to live with mom and dad. He is 16 and is a very nice kid. She is 14, smart, sassy selfish and stubborn.

We have never lived together before but have enjoyed every weekend together but now it's going to be difficult for him to come up even for 2 days per month versus the 12 days we were able to see each other before. He has the 5 year long distance plan for us if I want to start coming down more. I will have to change my life to make this work for the decision that he and his daughter has chosen. I am bitter and resentful but love him so much. What should I do?