How can we go back to being friends?

You and Theo dated in 5th year. You did a lot together. Even though his friends didn't like you, he didn't care. He couldn't care less about you being a Gryffindor. Or muggleborn. He just.. liked you. You guys always snuck eachother into your dorms, watched movies together, held hands, went on dates, played games, got high together. You basically did everything together. That was strange for Theo. Before you, he hadn't thought of girls like that. Sure, he was popular with females, but he was a really objectifying man. One night stands were all he had. You literally changed the way his mind functioned. That was until 6th year, when everything changed. Theo never expected you to walk up to him one day, a sad expression on your face, and say the words "Can we talk?". His first thought was "No. We can't talk. Let's just sit here." But instead he nodded. He should've said it. As soon as the words "Can we still be friends?" Came out of your mouth, he zoned out. Friends? With you? The one he'd kissed, touched, loved? Wait. Shit, does he really love you? The next day, he watched as you walked past him, a neutral expression on your face. You walked past him as if you didn't even know him. Friends? Yeah, right. He stared at your figure as you walked towards your friends, the way your hips moved, the way your hair swayed. Anything that caught the eye.