I wont say much since u have penned it down so beautifully but yeah i wud say that there is a difference between 'trying' to be happy and 'being' happy with life,'trying' to fall in love and 'being' in love.
Riddhima is 'trying' to be happy and 'fall' in love with Sid.
With Armaan she doesnt 'try'.it just happens 😊