Do you usually think of the same person before you go to sleep?

I noticed that since the first time I got deep feelings for a guy, (at 21), I have always had someone in mind before I fall asleep.
I feel a bit creepy, but I always think of a guy I used to be seeing on and off for 2 years. Haven’t seen him in half a year now but I still think of him everyday a lot, especially before I fall a sleep and also if I have a slow morning. I obviously still have feelings for him. But it seems like I always have to have someone to think of before sleep. Thinking of old scenarios etc

Do most people have this?
Do you usually think of the same person before you go to sleep?
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