Smile has many meanings rather than just being happy . A simple smile hides many things just need to understand it and smile a bit more.
Many relations break because of ignorance and ego , we try to hide our feelings and think that the other person should get without our saying . But this leads to menace and the relations break. So just say and be thankful for whatever they have done for you , just say it once ..
We often search for support from others , motivation from others but the point is we ourselves are our best supporter and best motivator ,we don't need anyone to be there for us as far as we are there for ourselves.
Peace and calmness in today's world is a big deal and everyone's in the search of it but eventually very few accomplish it.