He thought about his ambition and remembered how Aara talked about her career and John teased about his poverty "yeah I am poor but I never hurt anyone or I never treated people like they treated me".
He said to himself that he should focus more on himself and his career because he realized that he had no other option of going back to Aara or pleasing Aara. He knew that reaching his destination is not an easy job and that he must work hard. He took his diary and started to write something which made him shed tears again.
All he wanted is to help the poor after reaching his destination. He expressed "River can make the boat shake but still it can reach its destination without any damage".
He messed up his life with many useless thoughts and he promised himself that he would never do that mistake again. Even though he was calming himself with many words his heart still goes back to Aara's memories so he decided to live with her memories.
some people are hard to take out from our life even though we try harder. The more we wanted to let them go our hearts wanted to hold them back so hard. Now dev decided to chase his goals so that may change him slowly.