Yup. But, your position isn't logical, IMO.

If you believe in an afterlife, then, that presupposes a belief that some part of us humans is not physical and may, in fact, be eternal. If humans are possibly eternal (at least in part), then why is it impossible to believe that there might just be a God (or God's) who is also eternal?

I find it much more logically consistent to believe that the simplistic complexity (yes, I'm juxtaposing those two things intentionally) of everything we can observe was created by something. That something, if it was indeed the creator of everything, would necessarily be many orders of magnitude greater in intellect and wisdom than anything than we are capable of thinking and observing. Then, if that's also the case, why would it not be fitting to call that thing God? (I'm basically borrowing "The Watchmaker Argument" from the school of Intelligent Design.)

I find the universe much more easily comprehensible from the perspective that it is a dynamic system designed and set in motion by an omnipotent, omniscient creator, since, it really does appear that there are real laws that govern all of physicality. I assist reject the argument of most materialists that we humans are just simply mechanistic extensions of the only physical universe. So, I also posit that we have a soul and that our soul lives on after our physical demise. Most systems of thought don't treat this very well, but, given that there are so many of them, I do think that one of them should be closest to the truth.

To summarize:

If humans have a soul, God very likely exists.

Adenda: atheists are idiots. (Not sorry. 😎)