1 Kunal is in prison for adultery
2 He is suffering from Tuberculosis
3 Treatment of Tuberculosis is extremely painful with medicines and injections every day, so in a way he's suffering everyday
4 He wants to see Mauli, he's regretting everything he has lost by losing his mind once
5 He sees Mauli, he is happy for a moment but she is with someone else, so there's that pain
6 Mauli is there but she didn't even recognize him, his existence doesn't matter to her
7 He wants to hate the man who's standing with Mauli but can't because the man is the only one fighting to keep him alive