"How do you know when you legit like a guy?"

This is different for everyone ha but usually when you always want to be around them, or try to find ways to be with them, or see them, or think everything they say is funny when it's not. Getting nervous or "butterflies" when they're around. Looking forward to seeing them, always wanting to talk to them. Finding reasons to text or call them all the time.

I could go on for days but if you find yourself thinking about them a lot, that's usually the biggest clue.