1) I’m 1000000% sure raghav did not say pallavi is with him because he’s rich
We didn’t hear the whole conversation, and it was definitely not implying that she’s after his money
He must have been saying, they are living a good life because of the wrongly-earned money, and he might have said something about how she used to live before 
Which is why she is hurt and decides to go back to living that way, she will not separate from raghav but she will start being self-sufficient
2) Raghav will not go crazy! It’s literally an indication that this track is going to clash against their personalities
The mentally unstable raghav INDICATES that they will both long for each other, but I’m guessing pallavi is too hurt from raghav’s words to make things normal again 
He will NOT go crazy, they are just trying to show the tension between the two! Again it’s and INDICATION!
Im going to put full trust in the makers that they deliver a strong track, there is a lot of potential! We finally get to see how the two very different individuals work out THEIR differences! 
chill and enjoy! 😊