Originally Posted by trailmix

Or you were at that in-between place between asleep and awake.

You have been dwelling a lot on him, it's not surprising at all that you think you "see" him. You probably have thoughts like, I wish I could see him, wish we could talk, how is he doing, is he drinking again?

And probably quite often?

So if that is the case it's not surprising that you are connecting that with random people in the street etc