Einstein asked this question saying that it is probably the most important question we can ask ourself. It's not as simple as that though, it's both friendly and unfriendly. What really matters is how we feel in the world.
Do we feel safe or not? Do we feel safe in our world, do we feel safe in our own body, which is our world? Stephen Porges says "safety is the body's response to the environment". This sense of safety goes way back, right back to our time in the womb. Safety is one of the biggest and most important issues we can tap on as it underlies so any issues. If we don't feel safe, we won't feel friendly towards ourself or anyone else, not in a true sense. When we feel safe we can trust, we can open up and protect ourself at the same time.
Try tapping on:
My body is the safest/friendliest place for me to be
and see what comes up ...