For boys ans guys, how do you show the difference that you are just being friendly vs. you like her?

For boys and guys, how do you show that you are being friendly vs. you like a person or you like her or have a crush on her? what are the sure sign that you liker her?

Im just curious! hahaha coz sometimes its hard to tell if you are just being nice or there's a meaning to it or i just notice it, it should be direct to the point haha

For guys, how do you show the difference? and what are the undeniable sign that you like a person?
For boys ans guys, how do you show the difference that you are just being friendly vs. you like her?
Post Opinion