Spiritual being. Human being. I am not sure there is a difference.
For various reasons, I feel like I've lived before. I don't know that all my lives were human. As a child, it was tough for a long while to grasp that I really was in this body, and it was limited in the ways that it was. Then I grieved. My body was a prison, a cage. I wanted to be free.
Then my very human life led me to understand the value and joy found in this incarnation, in this body- with all its accompanying pains and limitations. And I found freedom within this skin.
Whether I am here and in my body because it is some way to learn a lesson, or to teach a lesson to others, or because it is really who I am and the rest is imaginary, I don't know. While reincarnation makes the most sense to me given my own feelings and experiences, I don't really know if I was around before this life or what will happen to me after I die. I am comfortable with the not knowing.
What I have found is more important than asking what I am and what happens to me later is asking how I can love and become more connected with God now. The now never seems to disappoint. Whether I am a spirit being a human, or a human through and through... God is there, and the best I can offer is all I have- body, mind, and soul/spirit- for refinement in grace.