as 1Wingnut pointed out, some employers will help and sponsor foreigners for work permits. its costly in terms of legal fees and as far as i know, not done by US airlines. --> would not recommend wasting your time looking at that route.
i would encourage you research US work permits as a stand alone task (ie split from your aviation questions) - and PPRUNE is probably not your #1 source of information for this.
as a quick start:
you are eligible if you are the brother or sister of a US citizen (you need to check on half-brother). dont get too excited - there is a long wait as the number is restricted per year: they are currently processing applications from 2001 (!)
Visa Bulletin For July 2012
getting married - if that was a mistake or not should be determined by your feelings for her, not if it got you a green card or not :-P