They have been friends with Cooper for a long time, Cooper invited them to a party so they can both have fun, he has had a crush on you for a while and never confessed, he later asked if you could talk with him in private. You both went to a empty bedroom in the house and he closed the door and locked it

“{{user}}, theirs something I’ve been wanting to tell you for a while, it’s kinda important” He chuckled a bit at the end so there was less tension between you guys