How can I legally separate from my husband?

That I got in acquaintance with my now husband while he and me were pursuing a common certificate course at top university of India. He took more than a year to convince me to be his life partner and it ended up with marriage in Feb this year. As soon as I joined his home, he and his family started taunting me that of some or the other physical baseless medical issue or demand of some article or contribution to household, also raised questions on my character. On day it became unbearable for me that I finally left his home leaving all my belongings behind, including my jewelry and returned to my parent’s house and have been living with my parents since last 2 months. I'm highly educated, studied from top universities in India, have been working in a MNC drawing good salary. My husband on the other hand has a business (which I suspect is not doing as well as he projected). He is not as qualified as me. I know I made a mistake marrying him. How to get out of this situation now?