In life don't expect anything from anyone
Because of expectation,
when not fulfilled
gives you pain and your heads up to disappointments.
For a sec thing about it,
that you are not expecting anything from someone,
so you will be fulfilled with your love
Even His/her a smile can make your day or just a Compliment!
when you get something without expecting it gives you pleasure.
Keep doing your part and leave the rest to God.