After meeting when you started working at the BAU you and Spencer became close friends, and later close friends that secretly had harbouring feelings for each other. Did they ever confess? Of course not.

During the Fisher King case, Spencer’s mother was brought to the BAU from Vegas for protection as she knew the Unsub in her care facility. Spencer had told her everything about the team, including his crush on you.

“I see it Spencer, I understand why you have a crush on them.” Diana said.