According to Michelle Henderson, licensed mental health counselor who specializes in relationship issues, reciprocity in interactions is one of the biggest signs of mutual attraction. For instance, this might mean you’re both contributing equally to conversations — aka you're not the only one asking questions like an interview.

You'll know what their vibe is just by how you feel. "If you feel like you're receiving as much as you're giving when you're flirting with someone or trying to plan a date, then they likely are into you, too," Henderson says.

As Julie Krafchick, dating expert and co-host of the Dateable podcast, tells Bustle, "You can generally tell there's attraction when two people have that 'look in their eyes' when they talk to one another." It's that look that says they're only interested in what's in front of them in that moment.

If someone's attracted to you, they’ll keep their eyes on you whether they're aware of it or not. If they're making eye contact with you, that's even better. "People who are attracted to each other tend to look at each other, look away, and look back at each other into each other’s eyes," Christine Scott-Hudson, licensed psychotherapist, owner of Create Your Life Studio, tells Bustle. "The eye contact gets more sustained as the interaction goes on, not less." If they're also smiling, that's a good sign.

Some people aren't as quick to compliment others on the way they smell. But if someone you're into tells you that you smell nice, there's a good chance of mutual attraction. "We all release pheromones and they play a bigger role in attraction than we think,” Henderson says.

When it comes to knowing if there’s unspoken mutual attraction, pay attention to is the direction their hips are facing. According to Susan Trombetti, matchmaker and dating expert, if both of you are standing with your hips facing each other, this is a strong sign that you have each other's undivided attention.

If someone likes you, they'll be curious about you. They'll want to talk to you and ask you questions in order to get to know you better. "Maybe they recall that you had a big meeting you were stressing about at work or that you hate olives," Krafchick says. "If they make an effort to bring up a minor detail or interaction you mentioned, it means they were paying attention and subconsciously investing in a future with you."

When you're looking for clues that someone's into you, pay attention to small changes in their movements or behavior, like if they fix their posture when you come around. Another sign of unspoken mutual attraction is physical clues that they have no control over — like blushing. "People often blush when they're attracted to someone," Scott-Hudson says. "If the person you like has a lot of color in their cheeks, it's a good indicator that they're feeling something when they're near you."

According to Jeannie Assimos, chief of advice for eharmony, a major sign of mutual attraction is physical touch. "When they say actions are louder than words, this is definitely true when it comes to attraction," Assimos tells Bustle. If you have no problem grabbing their hand, or if they like touching your shoulder, you're showing unspoken mutual attraction.

"If you're newly dating someone, and you both are expressing attraction (whether it’s a casual touch, or even just sitting together closely), the best thing to do is to let things flow organically," Assimos says.

Another telltale sign of an unspoken mutual attraction is when someone goes out of their way to do nice things for you, Jenny Muscolo, relationship coach and co-founder of Connection Copilot, tells Bustle. It can be as simple as getting you an iced coffee when they notice you’re in need of an afternoon pick-me-up. It can even be as big as getting you a thoughtful and unique birthday gift that shows they remembered an obscure fact about you.

“Not only does this point to a mutual attraction, but the fact that it took effort to locate such as item makes the attraction even more obvious,” Muscolo says. If you notice that they don’t really make the effort anyone else, there’s a really good chance they’re into you.

When you like someone, you’ll try to do what you can to be around them for as long as possible. It’s why lingering during or after brief conversations or interactions is often a sign of mutual attraction. “For example, if you and a co-worker are mutually attracted, you may both unconsciously linger a bit longer at each other’s desks, during breaks, or when accidentally intersecting in the hallway,” Dr. Carla Marie Manly, clinical psychologist and author of upcoming book, Date Smart, tells Bustle. Being around each other feels good, so it’s a way of hanging on to that feeling for as long as possible.

Some people have a hard time maintaining their cool when they’re around their crush. According to Manly, “A heightened sense of awareness of the other person’s presence, coupled with the often-unconscious desire to make a good impression or ‘get it right,’ can lead to what feels like a middle-school level of nervousness.” If the person you’re attracted to is acting unusually fidgety or nervously laughs off their awkwardness, they may like you back.

If you're talking and you notice that your crush has somehow gotten much closer to you, this is a very positive sign of mutual attraction. “When we lean our upper bodies forward during a conversation, we are — often unconsciously — signaling heightened interest and attraction,” Manly says. This shows that they’re highly engaged and don’t want to miss a word of what you’re saying. It’s even better if they try to keep the conversation going.

When it comes to expressing attraction, some people are more transparent about how they feel. According to Michelle Davies, professional life and relationship coach, some people can’t help how they react when they see someone they’re attracted to. For instance, smiling is one of the best indicators of attraction. “Unconsciously, we can’t help but smile when we’re close to someone we like,” Davies says. “A person may not be able to give direct smiles if they’re shy. Still, a person who’s attracted to you will feel a flood of giddiness and excitement.”