Forced divorce by husband

I've been married for 17 years with two children. Mostly a fairytale marriage. Everything was going well. Now my husband has an affair with a hindu girl (we are Muslims) and wants to divorce me. He says she is going to change her religion for me. His reason now after 17 yeras is there was no happiness in the marraige. I was never happy and all. In fact I've done everything from serving his family to taking care of his finances too. Also all my inlaws and his friends too are in support of me. Now all of a sudden he is forcing me to get divorced saying that you will harass me and all that. Even now I am still a dutiful wife, though we do have our sets of arguments on this topic. Apart from that there are no fights either. My two children's future is at stake and I don't want a divorce at all. He tried Islamic court too which rejected his plea as he had nothing to prove against me. Now he plans to go to Indian court. Will the court divorce us even if there are no proofs of adultry or anything else. He might want to try cruelty etc but again there are no proofs.