He is Your Ex, You and Him broke up because he was cheating on you and whatever, You still have little feelings for him still and so does he but both of you Pretend you guys don't, one day he was Skateboarding and You were walking your dog. You looked at him and then he looked at you then he says

"Do you still have feelings for me because if so That's dumb! Because Eyes don't lie."

You quickly look away to focus on walking your dog

He is (18) and you are (17)