Is it normal to constantly dream about the same person?

For the last several months I've had dreams about a guy who I've only corresponded with a little bit. Too much information just might give away his identity so I'll just say I'm in the Midwest and he's in the Pacific northwest and we've emailed a couple times. We sort of fell out of contact because he's very depressed, especially since there's a lot in his past that he regrets. And last time we corresponded I was feeling very broken due to some stuff going on with me. But he's in a lot of my dreams, some very vivid dreams where I'm in a relationship with him. Then I find myself thinking of him at random times. It's really weird.