I fall in love in my dreams, but i cant see his face or talk to him

this all started when I was maybe 9, 10 or 11 years old. I was sleeping on my couch and I was lucid dreaming. I dreamt that I was already a teenager and I was escaping a building with a man. but I couldnt see his face... instead there was a grey blur. I know he's tall, has brown hair, and is thin/fit. and he is always wearing boring colours like grey brown and black. the first time I met him in my dream I fell in love with him.
When i woke up I thought that was the end of it and I would never see him again but throughout the years he's been recurring and coming back. we just get older and older together. Now that im in my late teens in my dreams we're both adults. maybe in out 20's or so. but instead of being in adventures we're now doing more adult things like having sex etc... this mystery man also brought on my first orgasm ever (I had never in real life or in my dreams), it was of course in my sleep but it was very vivid and very pleasurable. to this day I dont know what he looks or sounds like, but we fall in love every single time we meet.

could this be a sign of a mental illness or do you think I should be romanticising this? also I should mention that this isnt an every night thing. it only happens like 2-4 times a month.