Well said Jitendra.
While it is a continual process of learning to free ones self from expectation, it can be quite liberating.
I try to remind myself not to be bothered when something doesn't go my way and sometimes fall short. I find agreement in your words, that the joys we experience not just from external substances are temporary but so are the relationships we develop. It is best to Love in all aspects to the best of one's ability, with God always in mind.
As Amma says, do not live in your past- draw from it if you must but the past is like the storage and we don't sleep in our storage. Inayat Khan says, if you are to hold on to the past hold on to all that was Good so it may serve you in your pursuit towards Perfection.
Lately I am more focused on the Now as I try to steer my mind to focus on whoever I am with in that very moment- a family member, a stranger, a coworker... Am I loving to the best of my ability in that moment? What messages might God be relaying to me through the Present? And, in my solitude, seeking God helps keep the mind on its course. Should I unwind and slip into the past, prayers and forgiveness have served me well.
Peace!!!