What does it mean if you are in a relationship but you have a dream you are with someone else and your significant other isn't even in the dream?

Dont worry about it. it doesn't mean you have feelings for this person. all it means is that you probably saw this person more in the day or you talked to them more. dreams are based off of memories of the day, week, or month. if you just saw this one person more, they may show up. dont worry about it your fine:)