I have been married 40 years with a great guy (most of the time, haha). If your relationship does not start out with lots of love, respect and understanding, there is no hope it will last through the highs and lows that life sends your way.
With the lapband surgery, it will be alot easier to get through the first few weeks without worrying about someone else.
We all have choices for what we do with our lives and there is noone else to blame. We are where we put ourselves. So take the steps you need to make your life how you want it.
Good luck!!