They say, how you do one thing is how you do everything. So how do you do yourself?
Do you speak, treat and think of yourself the same way you do to others? Or are you putting them before and above yourself? Are their needs more valuable for you to fulfil than your own? Why?
Talking, treating and carrying yourself in the best way you can and believe one is deserving of, is not a selfish act. In fact the contrary.
The example you give others by the way you treat yourself is crucial for your wellbeing and all that you receive. It comes from us first - from the inner believe, through the outer expression to the way others are reacting back to us.
Your first priority is yourself.
Then rest follows with ease.