There are several small steps that you can take each and everyday to radiate happiness and positivity in a way to show others how appreciative you are
Juggling work and your personal life doesn't always leave a lot of time for you to think about others. That's not to say that you are selfish or ungrateful. It just means that the feelings of those around you can get lost in the shuffle of everyday life.
I've been focusing on being positive a lot in the past month. I've noticed that since I started doing a few very small things to help others feel good about themselves, my quality of life has significantly improved and I'm a happier person. They have even helped me significantly improve my relationship with a difficult coworker and can easily be applied to a difficult to work with boss. Keep in mind, it's you and your inner feelings that will shine and make the biggest difference to improve the relationships you have.