Explanation

 Mihika is right now at the loss of the words. She doesn't know how to justify her action. Thinking about the past, she realizes that when she get married is the time when she broke up with her ex.

Her ex is a good actor who acts like a sweet boy, who always tries to do things for her. He does many things for her, like waiting outside of college every day, so he can just walk with her, he also sends her flowers and do other things. 

 His friends tease him often due to her. She once scolded him, and tell him not to bother her. That day, he try to attempt suicide, his friends convince her, and she also feel a little guilty and decided to say yes to this relationship.

But she never let him take her advantage or cross boundaries, later she started to know his real nature, her ex might think that Mihika is a sweet and immature girl who don't know how the world run, but what he doesn't know is Mihika is also quite ruthless with those who play with her trust.