If you clicked on this article, chances are you probably already had someone in mind.

1. You put in more effort than they do.

Relationships are 50/50. If you're putting in 50 and the other person is putting in 10 that equates to 60, not 100. If this was a class, your friendship would be failing.

2. You're just not happy.

It's normal to reminisce about the past. But if you find yourself only talking about the past, and how great it was, it's probably time to analyze your current friendship. Don't feel obligated to be friends with someone just because you've known them for years. It's perfectly normal for friendships to die out.

3. You hear "I'm sorry..." a million times.

Okay, maybe not a million times, but enough that it's starting to become a habit. I'm sorry means "I'm really sorry. I will never do that again," not "I'm not really sorry, I'm just saying this so you won't be mad at me for now, but it's probably going to happen again in the future." If someone genuinely cared about you, he/she wouldn't take advantage of your forgiving nature.

4. They only message you when they need something.

If the conversation lacks a “hey, how are you?” or a “thank you,” chances are they really don't care about you; they just want what you have to offer.

5. They like your car more than they like you.

Picture this: you get a new car and all of a sudden friends, who you haven't spoken to in weeks, are hitting you up. Not sure if it's the new car? Suggest hanging out without the car. If they're still interested, congrats you've got some pretty great friends. But if they cancel, they're using you for a ride.

6. You feel obligated to act a certain way.

You should feel comfortable in your own skin when you're around your friends. If your friends scrutinize you for being different, it's time to move on. Don't worry though, there are people who will accept you for who you are.

7. It's all about me, me and only me.

We all have that one friend who loves to talk about himself/herself. But if you find that you can't input anything about yourself into the conversation, it can be very emotionally draining. Effective communication is more than just being a great listener.

8. Let's hang out... but I won't show up.

This is pretty self-explanatory. If your friend constantly flakes last minute, they don't value you or your time.

9. They never accept their shortcomings.

They never apologize, and deny ever doing anything wrong (for instance, denying a promise made, or a planned hang out). Try confronting them about it. And if that doesn't work, it's time to hit the delete button.

10. They tell you they're staying in, but...

When you check Snapchat they're actually hanging out with a bunch of friends.

11. They're glued to their phones.

If you're hanging out with them and they spend the entire time texting someone else, that's a red flag that they don't care about you – or at least not as much as they care about whoever they're texting.