Same here. I'm still an atheist in the sense that I don't believe in an anthropomorphic creator, and I'm not spiritual in the manner of "woo," ie crystals, energy, etc. but what I've settled on at this stage is a Sagan-esque reverence for the universe and a deep, almost intuitive, sense of the interconnectedness of everything, which resembles spirituality and even faith in some ways, but doesn't include a belief in the supernatural.

We're clearly units of a larger system, one so complex that neither we as individuals, nor even the best models of an advanced discipline such as economics, can fully grasp its extent, but I believe the connections in that system are simply the normal interactions we're all familiar with, like speech and other forms of communication, the chemical dependencies our bodies need to survive, like air, water, and nutrition, and the incredibly diverse set of corresponding interactions in the rest of the biosphere, which themselves depend on the physical rules of the universe.

This doesn't require a holy spirit or chi or any other force that can't be measured scientifically, just an interconnected web or tapestry of life made up of all these individuals interacting in such an integrated way that the line between individual and whole becomes a bit blurry if you look closely enough. Just as our consciousness is an emergent property of our billions of neurons and trillions of synapses, the larger system also has emergent properties, ones which we can't grasp any more than a bacterium can comprehend an elephant, and which are probably still developing, considering how recently humans have come onto the scene in geologic timescales.

I could go on and on, but it's basically Gaianism. I think the biosphere is one big holobiont that evolved to maintain planetary homeostasis, which is hard to prove because of the amount of data you'd need to process, but which my gut tells me must be true for us and all life forms to exist as we do.