In different countries of the world, Adventists
When I think of mismatched marriages i think of two people with different level of walk with God, different goals, different view etc. But never in my life, have I heard of the type of situation that you are talking about Paul. This not to say, that you are not living it. But as you mentioned, your view on Marriage is serious and so I would suggest that in addition to prayer, you guys seek counseling. But you have to ask yourself what were the purpose of getting married. My friend got married to someone from the carribean (and I am to, so no biases here), but his intentions was to get his paper works - green card. She knew that and had to confront the painful reality that despite the fact that she loved him, he did not love her that way and would probably never do. And I must continue to point out to her that if his intentions was just to get the green card, then there is probably no hope for them. Intentions is the key here. If you can find out why you guys got married, then you will know how to proceed.