It's not selfish to love yourself, take care of yourself, and to make your happiness a priority. It's necessary.

As humans sometimes it is easy to feel invincible, especially when the
bad habits that we give practice to everyday don't seem to affect us like
we are warned about.
One of the biggest killers to us all is stress. Stress is such a huge killer
because it messes with our body's different systems as a whole, and can
lead to things like heart attacks, stroke, and other diseases of the heart
and other major organs which will eventually result in failure.
Instead of worrying a life full of stress do your best to position yourself
in places of life that lead to minimal stress outcomes.
Sure, life is unpredictable, and there is much balance we need in our
lives in order to really live the healthy lives that we know we should live,
but dealing with preventing stress in your life can really be a big help,
and a good start to living a healthy life.