Unknown person in my dreams

Hey everyone,

I already posted this on Reddit, r/dreams and someone said i should post it here so here i am:

For almost a year now, there's been this guy who keeps showing up randomly and in a repeatedly in my dreams. The dreams themselves are always different sometimes chaotic, sometimes peaceful but he's always there. He's around my age, taller than me, dressed in dark, classy clothes. I only can't remember his face or name no matter how much i try, but I know him. I remember how he moves, his laugh, his voice...and most of all, the feelings he gives me safety, Comfort, Joy And understanding, those good feelings stay even after waking up, Like l've known him forever. Just to let you know currently I don't have a relationship with anyone like this, at first i didn't think about it much, i thought it was just my mind playing games with me, but now it's getting weird so i'm curious to know the meaning, here's where it gets weirder, my sister had a dream once where she saw me standing with a guy and talking to him, a guy she didn't recognize... and the way she described him? Matches the guy from my dreams perfectly. Tall, dressed in dark classy clothes, and hoaw we were close like it's someone i knew for ages. I didn't even tell her anything before that. So now I'm wondering what dose it mean, Has anyone experienced something like this before?