So, if he faces his body directly at yours every time you two talk, that's a good sign!Source: Shutter Stock Sweaty hands means you're nervous, but it's also a physiological sign of attraction.

Research has found that both male and females change their voices when talking to people they're attracted to.

Again, this might be hard to notice, but it's true!

Source: Shutter Stock Haven't you ever heard of the phrase "imitation is the highest form of flattery? When a guy is really into you, he will start subconsciously doing what you do - he'll match his actions to yours.

According to a study, this is a big sign that he likes you.

If you pay close attention to a dude when you see him, you might find that his body language gives away his true feelings.

New research just found that men will match their pace with a woman when they are in love.

When a guy feels good around you, he wants to be around you more. Don’t focus on signs, signals, or clues – because he’s not dropping them.

When you have a crush, one of the hardest things ever has to be figuring out how to tell if he likes you. How are you supposed to know if he’s flirting with you or if he’s just being friendly? As weird as it may sound, there are some legit scientific signs of attraction that you may not even recognize unless you know what they are.

Here are the most glaring, drop-dead giveaway signs a guy likes you: If he’s treating you differently, it means you’re special to him in some way. If he flirts with you, but he flirts with everyone, it’s not a sign that he likes you, because he isn’t treating you any differently than he treats everyone else. Who you are, what you like, and yes, what you have to say. So if he’s laughing a lot when he’s around you, it means he’s feeling good a lot when he’s around you.

So if he’s normally talkative and social, but around you he’s shy… Like I just said – if he flirts with EVERYONE, this isn’t a sign. Which means you’re probably the one making him feel good. If he’s freely mentioning other women he’s interested in when he’s around you, it’s a dead giveaway that he’s not interested. Well, if he was interested, he wouldn’t do anything to screw up his chances with you, and that includes talking about his other crushes.

It didn't only happen when they were holding hands, either.