Part of the reason he's asking questions is to get a piece of information about you that he can use to “hook” you. He's just using you as a strategy to get closer to her and break the ice. Either way, a guy that comes up to you in a bar, club, cafe, bookshop etc. If he approaches you and starts a conversation (and this is a guy you don't know), he obviously wants to hit on you.
If you say you like something and he goes on and on about how he likes the same music, movie, or whatever thing too – he's (maybe subconsciously) trying to see if the two of you are a good fit and have common interests. You might be at a bar or a club with music, so he has to lean in to hear you, but still – a guy that doesn't like you won't break his neck just to talk to you. If he comes up to you at work or college and the conversation is something random, this could also be a sign (why didn't he go talk to someone else?
But then again, if it's just the two of you and he insists on paying, either he's just a gentleman in general, or he likes you.Sure, guys and girls are different when they're just among close friends, or just guys or just girls, but still – he might be quieter when you're around, or more talkative, nervous, shy, or he'll try to act cooler, or be funnier to impress you. Think about it like this, when a guy isn't interested in you, he can still be normal towards you and have regular small talk (depending on the situation), but he (usually) won't have a reason to IGNORE you.Either way – if he's not 100% natural, he might like you, and that's why he's trying to impress you with something. A guy that likes you will either by shy and nice, or he'll ignore you and show confusing signals.What's a sure way to tell if a guy likes you or not?You definitely like him, but figuring out whether this guy likes you or not is just driving you insane. I'll tell you what most guys do when they like a girl, even if they want to hide that they like you or want to appear “cool” so that they don't blow their cover – you can still look for certain signals that will give them away.