I believe that if you have God truly number one in your life and in your heart..(and I mean truly),and the other person who your in a relantionship with is in the same mind frame as you where he/she has God first ,then your relantionship will go well and both of you will be able to help each other on your walk and journey with God,aside from walking with God individually(because we all have our personal relantionships with God as well.
I think people sometimes get to caught up in their relanionships and put God as second option and when you do that,if you notice 100 percent of relantionships dont work in the end.
Why does God come first some may ask?
Well for many reasons.His love is eternal,he loved us even before we existed.=).We should have a longing for him,a desire for him.The same way we wake up in the morning thinking of our other half,we should do the same with God.
With this all said,I do not think my walk with God would change at all..because with the Lord in my life I know what I need instead of what I want in a relantionship,I don't settle and wont go for anyone who doesnt have him first in his life and i would want someone as devoted as I am to be close to God.