How do you you know if you like a guy?
Do you like being around him? Are you trying to flirt with him? Do you think about him, and stuff you could do with him (dates, talk, jokes, kiss)? This would mostly mean that you have a crush on him. Then there's always that your heart beats near him, you blush when you hear about him or something like that. But not everyone does that. If you feel a lot more stuff going on in your mind, then you like him. You like him more than a crush.