Dreams about going to a carnival or fair often symbolize a desire for excitement and fun in your life. The presence of an "almost boyfriend" who is also a coworker suggests that there may be unresolved feelings or a longing for a deeper connection with him. The fact that he has decided against a relationship in real life could indicate your subconscious processing feelings of disappointment or frustration regarding this situation.

Picking you up from a past house might signify nostalgia or unresolved issues from that time in your life. It could also represent a desire to return to a place of comfort or safety. The broken arm could symbolize feelings of vulnerability or limitations, either in your relationship with him or in your current emotional state.

Overall, this dream may be reflecting your feelings about the relationship's potential, your desire for connection, and perhaps a longing to revisit a more carefree or happier time in your life. Consider exploring these emotions further and think about what you truly want moving forward. It may be helpful to communicate openly with this person if you feel comfortable doing so, or to reflect on what you need for your own emotional well-being.