This is definitely a very difficult situation. Were you not aware earlier that he is married?

no I wasn't

Does he loves you back?

he does,he treats me better and takes care of me

Better stop this here itself as one of my close frnd fell in love with our teacher who you was young yet married. He said it was an arranged marriage and tried to manipulate her and somewho she got clear. Just gave a think that the kindness the person showing you now is the exact same thing what he showed to his wife but now he changed so theres no gaurentee that the person will remain the same. People always fight for better-ness and once they get that they will hunt for something better than that. Im not accusing the person but im telling you the reality.

okay thank you

but now how will I deal with everything. its gonna hurt for sure