If she wasn't happy with Adi and had found someone else that means she was cheating, right? Even if she was going to let him know. I don think he will move on easily. How can he be satisfied when the bubble he lived in has been bursted. He thought Puja loved only him and was happily married, but that wasn't true. Obviously he is not going to be calm and patient about it, we know Adi now.
About finding solace, well, he has a good for nothing family which doesn't care about him, doesn't understand how sensitive he must be, how broken he must be. Even if they do, they stay distant and aloof. So he has found solace in booze, which portrays how broken and destructible he is. Eventually, AdiYa will find solace in each other but first they have to deal with the chaos their life is.