Friendly: He hugs you hello and goodbye whenever he sees you. He even gives you chaste kisses on the cheek.
Flirty: He hugs you a little too tightly and for a little too long. In fact, your embrace lasts long enough for you to breathe in his cologne and feel the strong bones beneath his shirt. When it’s time to pull away, you’ll both linger, trying to keep your bodies as close as possible for as long as possible.
Friendly: He’s comfortable touching you. He occasionally gives you high fives, fist bumps, and playful punches on the arm.
Flirty: He sits as close to you as humanly possible, which is why your arms or legs are touching at all times. If there’s ever a time when your bodies aren’t grazing, he’ll uses any excuse he can think of to put his hands on you.
Friendly: When you make eye contact from across the room, he’ll make a silly face or give you a little wave.
Flirty: When you make eye contact from across the room, he’ll either wink to seem sexy or will act like he wasn’t even looking at you in the first place, because he doesn’t want you to realize how often he admires your beauty.
Friendly: He’ll talk to you about sexual things without thinking twice about it. He’ll tell you all about his dick in the casual way that he talks to his guy friends about it. For some reason, it’s not weird at all.
Flirty: Whenever something even slightly inappropriate is mentioned, you can feel the sexual tension between the two of you. You can’t discuss sex without thinking about fucking him, and you can tell by the look in his eyes that his thoughts aren’t pure, either.
Friendly: He can go all out and tell you that your ass looks amazing in your new jeans, but it’s not a big deal. It feels the same way it does when your female friends compliment you, like it’s nothing more than a friendly observation.
Flirty: His compliments come more from his eyes than his lips. It doesn’t matter if he says something as subtle as, “You look nice today.” You know how much he means it by the slow way his eyes scan over your body before he speaks.
Friendly: He hates some of the other guys you hang out with, but only because he knows you deserve better. You’re his friend, so he wants you to be as happy as you could possibly be. It’s nothing more than that.
Flirty: Whenever you mention another man, even someone famous like Chris Pratt, he acts like you have horrible taste. It’s clear that his annoyance stems from jealousy. There’s no other explanation for it.
Friendly: Whenever you hang out, you have fun, even if all you do is grab some food and talk about your boring life while you eat. But even if you get drunk or high, there’s never any extra touching or almost-kisses. Things are completely platonic, no matter what situation you put yourselves in.
Flirty: It’s dangerous for you two to get drunk around each other, because after one or two beers, you always end up on each other’s laps. In fact, it’s dangerous for you to be alone in a bedroom together, alone in the living room together, or alone in general. Honestly, everyone you know is surprised that you two haven’t fucked yet.
Friendly: He’ll look at you while you’re speaking, but once you trail off, he’ll look elsewhere. Whenever there’s a pregnant pause in conversation, he’ll check his phone or think of a new conversation to fill the silence with.
Flirty: When there’s a pause, he’ll keep looking into your eyes, or will even glance down at your lips, like he’s thinking about kissing you. You’re always looking at each other for a beat too long. It seems like a subtle thing, but it’s a huge indication of how he feels about you. 
