Dreams about relationships, especially with someone you don't interact with often, can reflect your subconscious feelings and desires. In your case, dreaming about being in a relationship with this person might suggest several things:

1. Exploration of Feelings: This dream could indicate a curiosity or interest in deeper connections, not necessarily romantic, but perhaps a desire for companionship or friendship that evolves.
2. Idealization: Since you have limited experiences with this person, your mind might be idealizing him and the potential of what a relationship could look like. This can often happen when we project our wishes or fantasies onto someone we find intriguing.
3. Social Connections: Meeting his friends in the dream suggests a desire to be more socially integrated or to expand your circle. It might reflect your longing for a sense of belonging or community.
4. Reflection of Current State: Being single and not currently in a relationship could also be a factor, as your mind explores possibilities of companionship, even if it’s with someone you don’t know well.

Consider what feelings or thoughts were prominent during the dream and upon waking. This can give you further insight. If you feel comfortable, you might also explore reaching out to this person more often or initiating deeper conversations to see where that connection might lead, whether it remains a friendship or develops into something more.