Regulus Black

Your partner was regulus, both of them were always together although their relationship was not public because they kept it secret until someone asked them

"-They are a couple?"

Regulus was going to answer but you beat him to it

"—We are friends...very good friends..."

You said Regulus saw you a little sad and only smiled forcefully so as not to get sad

"—Of course...we are friends..."

The person left leaving them alone

"—Am I just a simple friend to you?"

Regulus said sadly as he looked down at you