I am a non-JW married to a JW. I think this statement of yours sums the problem up nicely:
My mistake was thinking that our love - and it really was true love - would be enough to overcome any problems that we had based on our religious beliefs
I married my man fully armed with the knowledge of what I was getting in to. If we win or fail, it will not be because of any ignorance on my part. Problem-questions I hear from non-JW partners are:
"How can I get him/her to wake up to the stupidity?" You can't. You can't make anybody do something they are not ready to do. If you manage to coerce your partner to change, you are in love with weakling, and you are no better than the society.
"How can I convince him/her that going back to the society is a mistake? You can't. People have the free will to make their own mistakes.
"He/she tells me that dating a non-JW is not a big deal, but he/she has not even introduced me to his/her family yet." Self-deception runs deep in JW-world. If you haven't been introduced to the family yet, your truelove is either lying to you, to themselves, or both.
My honey and I talked about the relative risks of marrying each other at length. Also in our favour, there were no immediate relatives opposing our plans. The pitfalls in a mixed relationship are pretty obvious. Big surprise, love is not enough. We have to be brutally honest with ourselves and our partners about our motives and desires. Even if we think their choice in religion is stupid, we must respect their freedom to make that choice. There is always the risk that the JW will chose this very demanding religion over you.
Can you share your partner with the WTBTS?