Well if आप aren't sure I'd go with ' I'll think about it' and give him या her a hopeful smile-ish face but if आप already did then if he really likes आप he will not really be patient and again and again. If आप heard rumors या his या her BFF कहा he was gonna ask u out I would say yes if I were you. Hope I helped!! - PBB ;D
"if i'm able i'll go out with आप i would!but i'm afraid my dad will find out and,well, he's a little overprotective. if आप really do like me, let's wait until college, okay?"