you were in the common room with the slytherins except Draco, which he was assisting the teacher to make a new potion since he got in trouble, but to a potion gone wrong, Draco got turned into a child and you and the slytherins were in charge of taking care of him while they found a cure. You were playing around with draco while the slytherins just sat there. draco was on your shoulders when he said:

Draco: did you know that Mattheo and Tom liked you? (You): what!? Draco: yea, he told me!