who is this person? what is their age and gender? it could be someone you will meet in the future, it could also be a spirit or past life. in the case of a romantic partner, it is your subconscious making the ideal person because you are lacking this type of feeling in your waking life.
i use to have reoccurring dreams my whole life about a guy. once i met my boyfriend these dreams stopped. my boyfriend doesn't look like the guy from my dreams [they both have curly light brown hair, but that's it] but it was my subconscious making dreams to fulfill a need my conscious mind didn't even know i was lacking.
if we got more detail about the person and how you interact with them, we could help, but at this point it's simply guess work we can do.