S03, I haven't read through your sitch but I want to welcome you to Piecing.
Lost Rabbit is right, this is where the hard work starts. It was tough before but it's going to get a lot tougher.
Do you have a transparency plan in place? This is extremely important when there is OP in the picture.
Also, I would advise you to go slowly. I know that everything may seem all hunky dory right now but if you don't address the issues that got you in trouble in the first place then they will come up again. Don't sweep things under the rug, communicate and figure out how to make things stronger.
If you love somebody, set them free. http://tinyurl.com/2empx2g