We're all guilty of trying to get the attention of someone who is not completely interested in you. Maybe it's a friend that you've caught feelings for, or by some twist of fate you've met a beautiful stranger who is mildly interested in talking to you but has no intentions of making things go further.

Either way, you know--or worse, don't know--that you're making a fool of yourself for relentlessly going after that person because it will never work out between the two of you. Believe me, I'm a pro at experiencing both ends of these awkward encounters. You might be able to save yourself some shame if you watch out for these obvious signs telling you to stop going after someone who is not reciprocating feelings.

1. Body language

Signs that someone is standoffish include turning away from you, lack of solid eye contact, and staying at a distance during conversation.

2. Tone of voice

If someone sounds annoyed or lacks expression in their voice when talking to you, they might not be interested.

3. Hesitation to give you their number

This sounds like it should be obvious but if someone is hesitating to exchange phone numbers with you, they don't want to talk to you.

4. Change of behavior

This goes along with body language and tone of voice. If they act hyped with their friends and then standoffish with you, sadly it's time to go.

5. Absolutely nothing to talk about

Save yourself this awkward moment before it's too late.

6. Mentioning they have a significant other

Umm... HELLO. Red light.

7. Constantly bringing up or looking at other men/women while talking to you

If they are constantly checking out other people around you, aka your competition, or constantly talking about them, it's just awkward. How can you know if someone is interested if they won't focus on you?

8. Their friends get in the way

Wing men are essential for a successful pickup. Just as your friends would back off to let you talk to someone when things are going smoothly, the other person's friends would do the same. So if you find yourself in a situation where someone's friends step in to pull the or to otherwise ruin your conversation, TAKE THE HINT.

9. Eagerness to leave

If they are looking for an escape route, you should be able to tell they don't want to talk to you- the lamer their excuse to leave, the more you should realize you've wasted your time.

10. Excuses not to see you

If someone wants to hang out with you, they will make an effort. So if they are constantly making excuses when you ask to see them, they are trying to politely decline your invitation.

11. No phone response

Mostly for calling, texting, Snapchat, etc: sometimes not responding is a response in itself. Someone will leave you on “read” or “open” if you try to talk to them and they don't want to talk back. If they don't answer, don't bombard them with messages. Or do.

12. Dry phone response

Sometimes "K" and "Lol" are worse responses than no responses. If the majority of their messages consist of short responses that do not contribute to the conversation, stop talking to them.

13. Flat-out telling you no

The most blatant sign at all that people disregard. No means no, people!

If you are giving off these signs and the person is not taking the hint, pull up this handy article for them to learn. And if you are on the receiving end of these signs, don't worry. There is nothing wrong with you. It's just not meant to be, so don't force it. Think of it this way: the time you waste on that person could be spent on someone even better. Simply keep calm and move on.