not his girlfriend
You're not his girlfriend, but you're the first person to listen to his ramblings. The first time he realizes, he notices he's been talking for too long without taking a breath, and you're still paying attention to what he's saying. Microbiology. You know nothing about the subject, asking him to clarify stuff while he talks. He's surprised because everyone always stops him.
You're not his girlfriend, but he knows your coffee orders. They're all disgustingly sweet, as the teams point out, but he knows what to get depending on the day. No matter how urgent the briefing is, he goes out of his way to stop at your favorite coffee shop. Every day, you're greeted with a fresh cup of coffee and a smile.
You're not his girlfriend, but he comforts you after emotionally hard cases. You often find yourself in his arms after wrapping up the cases, resting your head against his chest, allowing him to stroke your hair. He'll spend the flight next to you, his pinky resting on your arm as a way to ground you without the rest of the team exchanging glances.
You're not his girlfriend, but you don't leave his side when he gets shot on the field. You hold his hand as the paramedics carry him in the ambulance, and you only let go when they take him into surgery. He wakes with you by his side, his fingers immediately intertwining with yours before he's even fully awake. You smile and tell him he's an idiot for taking that bullet for you. He replies back with a smile and a, "Better for me to be injured than you."
You're not his girlfriend, but he makes sure you're paired up on cases. He goes to shooting practices to prove to Hotch he can be on the field with you, to prove that he can protect you. He does the stuff you don't want to, mostly readings you don't want to spend hours on or bagging up a used condom from the toilet.
You're not his girlfriend, but you to every nerdy event with him. Whether it's a Spock convention or some nature documentary showing, you're there by his side. No longer does he find the seats next to him empty. Instead, when he looks over, he sees you and smiles, because now he's not alone.
You're not his girlfriend, but his mom thinks you are. When you spend a few days in Las Vegas for a case, you visit his mom with him, meeting her for the first time. She greets you, smiling coyly at her son, asking you if you like dating his son. He spends the next few minutes trying to convince her you're just friends. And the rest of the month trying to convince himself.
You're not his girlfriend, but he kills the man holding you hostage. He's the first to notice you gone, and he's the first to burst through the door, gun out. He doesn't bother talking to the unsub, doesn't bother descaling the situation, doesn't bother to wait for the rest of the team to enter before delivering a bullet through the man's head. He doesn't bother stepping over the body before he unties you and takes you in his arms.
You're not his girlfriend, but he covers you with a blanket when you fall asleep. He turns the TV off, placing a pillow under your head softly, making sure you don't wake up with a sore neck. He strokes your cheek with the back of his hand, longing in his eyes as he watches you breathe.
You're not his girlfriend, but he wishes you were.