We've all heard of them. We've all encountered them. He's cute, funny, smart, and seems to have it all together. You two hit it off at a party and he asks you for your number. You give it to him and then—nothing. Another day passes—nothing. You think to yourself "maybe he doesn't like me." You start to question your confidence. "Am I not pretty enough or...?". Then, on a random Thursday night at 2 a.m. while you're fast asleep, of course, you get a text. It's him—FINALLY! You unlock your phone with one eye opened and you read three letters and a question mark: "wyd?". Oh god, he's an "F" boy.

Here are 19 signs he's an "F" boy and why he doesn't deserve you.

1. He uses Snapchat as his only mode of communication.

Really? Couldn't you have just texted me back? A young woman should be able to enjoy a simple phone call or text about how each others days went, not a few snaps back to back where you ask me to play "21 Questions". smh.

2. He uses the "sorry I was busy" excuse.

Okay, but your Snapchat story is about 100 seconds long and you even had time to view mine. Just let me know you're busy so I'll stop texting and give you your space. Easy.

3. He considers Netflix & Chill, a date.

This one is a red flag. This is not a date, whatever he says. Okay, ladies? You deserve something way more intuitive. The least he could do is get a Hulu subscription instead.

4. He disrespects his Mom.

Okay, HUGE red flag.

I repeat.

HUGE.

RED.

FLAG.

If he's not going to give respect to his beloved own mother what makes you think he's going to give it to you?

5. He uses the following emojis:

It's cool to express how you feel through an emoticon in this day and age but, if the text to emoji ratio is imbalanced, are you really trying to have a meaningful conversation with me or nah. 😒

6. He only texts you after 10.

What are you, a vampire or something? Text me when there's actual sunlight outside and people are actually out and about. I'm not your Bella Swan.

7. He has no ambition in life.

A young lady shouldn't expect a full blown life plan from a guy because we're all young and still figuring out what we want to do, but if all he plans on doing for the rest of his life is finishing up seasons on Netflix rather than finishing up his college degree, I would keep on walking.

8. He probably vapes.

We get it, you vape.

9. His Instagram is filled with pictures of him and a ton of other girls.

This is a dead giveaway that you're not the only girl he's interested in. Obviously his mind is set in a lot of different "tagged" locations.

10. "Do you want to come over?"

No, I rather not have you embarrass yourself while trying to make a move on me. So let's save the small talk for a dinner you actually take me out on.

11. You only hear from him when he "needs" you.

This is definitely an "F" boy. He's just using you to get what he wants and you shouldn't even think about giving it to him. Do yourself a favor and don't be naive.

12. He doesn't text you back.

Yeah, he got the text. Yes, his phone did receive the message. It's 2015, you mean to tell me your iPhone 6+ with lightening fast LTE didn't receive my text? OK.

13. He asks for nudes.

Ladies, don't do it. Have respect for yourself and your body. He won't be the only one who sees it anyways.

14. He only says what you want to hear.

He'll lie just for his own benefit to make himself look good, don't fall for it. Deep down inside, you know the truth. Don't let a dumb boy displace you on your path to success.

15. He only cares about physical appearances.

If he only mentions the physicality of a girl, he probably doesn't care about your interests or hobbies. Trust me, I'd rather hear "You are so kind." over "You have a nice ass." any day.

16. He makes you feel insecure about yourself.

LADIES, if he's not empowering you, he's not benefiting you.

17. His favorite subject is himself.

If all he talks about is himself, he's too young for you girl. The best qualities of character are found in the people who listen rather than brag about what they did for Spring Break 2 years ago. Yawn.

18. He continuously cancels on plans.

Don't waste your time and opportunities on someone who obviously doesn't care about you. If he doesn't follow through, forget him. You have so much more to worry about.

19. You matched him on Tinder.

No.

Just no.

We as young women should constantly push the boundaries of womanhood each and every day to improve ourselves in becoming the best women we can be. We shouldn't let the devious and childish minds of "F" boys affect that. We know we deserve much better, so why bother? Sure enough, the right guy will come along and it'll be so worth it. It's important to keep an open mind and just have fun while we're young. Forget about trying to find the perfect #ManCandyMonday. Remember, fate never fails.