Can dreams we get actually come true and what do they mean?

well ive been wondering if regular dreams we dream of come true. because ive been having several where it includes my long distance even before ive gotten with her and got to know her well enough. i had dreams where i was at a hotel in her state. the next day i have the same dream but this time my arms are around her and her head on my chest. the next after the same dream but her moms standing outside smiling. then my cousin had a dream where me and my gf came to my home town to my cousins house. can dreams like these really come true and what do they mean?