Cheating Husband. Seeking for legal options

I am Hindu.I have been married for 8 months now. We have had our ups and downs, mostly downs. His emotional attachment right from the day we got married has been fluctuating. I have confronted him a lot of times , along with his parents but he doesn't change. Coming to the point, recently i discovered that he had a tinder app on his. I immidiately got alarmed and asked him about it. He said he had forgotten to delete this app and was just lying in some subfolder on his phone. I believed him and let it go. Yesterday I got a message from a friend of mine showing me a screenshot of him being on tinder. I thought that he must have genuinely just forgotten to delete the account. But my gutt didn't really convince that thought so i created a fake tinder account using a different name and a animie picture. Just a few swipes later I saw his profile and I clicked yes on it . This morning when he left for work we both matched. And to my horror he has still been chatting to me not knowing who i am. My question is , what are my legal options here. Is it a strong case for adultery ? I do want to consider divorcing him, how do i go about this. I am clueless and would appreciate some direction on this. My parents are supportive of my decision.