Sorry to hear your news. This sucks and there is very little you can do to stop this rollercoaster once it starts. The religion is very controlling and your relationship is likely to be a casualty. In JW world all relationships are conditional and disposable. To be able to have a relationship with his family he needs to comply with JW standards. That means attending meetings and showing repentance. Part of that means rejecting behaviour that goes against JW beliefs. The key here is that sex outside marriage is forbidden and dating a non JW is seen as disloyalty to the organisation.
He hasn't tried to make you a part of his journey back into the faith rather he has distanced you from what is going on. He has asked you to leave even though you have contributed to the rent. It may be worth giving yourself some space to think about what you want. You deserve someone who loves you unconditionally and who shares their plans with you. You can only say if you are done with this relationship but I fear the decision has already been taken out of your hands.