To pursue or not to pursue? That is the question. Sometimes, understanding that a woman isn’t interested in a guy is as simple as her walking away or letting him know upfront that she doesn’t want to be bothered. Other times, there are more subtle cues that he’ll have to notice in order to get the hint. Here are a few clues that’ll indicate whether a woman is feeling the romantic vibe.
1. Lack of Eye Contact

When she isn’t looking at you or is purposely trying not to make eye contact, it’s a sign that she’s uncomfortable. When someone wants to engage, eye contact is a huge factor. The absence of it could be an element of being shy, but you can usually detect the difference between a timid person and someone who is annoyed.
2. Short Responses

If a guy is conversing with a woman and she’s giving the shortest responses possible, she probably doesn’t want to talk. This also accompanies her not trying to divulge any personal information as well. A simple “yes” or “no” to questions that could be extended means that she isn’t interested in getting to know you.
3. Fake/Forced Smile

It’s really easy to tell when someone is forcing themselves to smile to be polite. If a man is talking to a woman and it seems like she’s giving that kind of half smile or grin that’s not genuine, it’s time to exit stage left. There’s no use in trying to force something to be that isn’t organic.
4. Changing The Conversation

The subtle art of changing the conversation from flirty to cordial is a dead giveaway that the woman doesn’t want to discuss being in a relationship or dating. If she starts making things more general, talks about focusing on her career, or appears to constantly switch the topic from romance to anything else, it’s over.
5. Taking a Long Time to Reply to Messages

Texting is tricky because sometimes people lead busy lives, and it’s not always possible to respond as soon as you receive a message. In this case, it might be a clue that a woman isn’t interested in a man if she always seems to take a long time to reply to his messages. This is especially true if she’s made it known that she has some free time. Still, he should lay off texting a bit, and if she reaches out to him on her own, perhaps she is just always busy.
6. She Calls You a Friend During Conversation

Getting put in the friend zone can look a lot of different ways. If a man is talking to a woman and she blurts out that he’s such a good friend when he’s obviously making advances, that’s her way of saying, “Yeah, no thanks.” It’s a passive-aggressive way to ask him to stop trying to ask her out because she’s not interested in the same way.
7. Turning Her Body Away

When someone turns their body away during a conversation, it typically shows a lack of interest or engagement in the interaction. This non-verbal cue suggests that the person may be mentally or emotionally distancing themselves from the conversation or the person they’re talking to. It can be a subtle way of signaling disinterest, discomfort, or a desire to discontinue the conversation.
8. Blocking The Body

It’s not uncommon for a woman to place her purse in front of her body or cross her arms to prevent someone from moving closer into her personal space. It could mean she doesn’t want to be approached. However, sometimes people cross their arms out of habit, so taking this in stride with other nonverbal cues is crucial. Generally, leaning closer is a sign that she’s engaged, and blocking herself off means there’s some form of apprehension.
9. Blank/Cold Stare

A blank stare or looking annoyed isn’t necessarily subtle, but it’s not as bad as someone saying, “Leave me alone.” A woman who isn’t smiling, responding, or showing any sign of enthusiasm more than likely doesn’t want to talk. A cold stare during what seems to be a friendly conversation highlights a lack of interest in the discussion.
10. Monotone Voice

Likewise, someone speaking in a dry tone without any inflection is also a red flag. Some introverts indeed have this problem because they’re uncomfortable engaging in direct conversation, but that aside, it typically means the person wants to end the conversation. Warm, friendly tones are more indicative of interest.
11. Constantly Checking The Time

Constantly checking the time during a conversation can suggest a range of emotions, including impatience, disinterest, anxiety, or nervousness. It may indicate a desire to end the conversation or that someone is uncomfortable with the current topic. A woman will give you her undivided attention when she’s genuinely interested in getting to know you.
12. Distracted on The Phone

It’s more rude than subtle, but a lot of women said they’ll scroll social media, check their text messages, and play games on their phones while a guy is talking to them to send the message that they’re not interested. So, if she does more than glance at her phone periodically, she might not want you to keep talking to her, and she’s trying to tell you she has other things she’s focused on at the moment.
13. Doesn’t Laugh at Your Jokes

When a man makes an obvious joke to break the ice, and the woman doesn’t even feign a smile or chuckle, it might signal that she doesn’t want to talk. Of course, the joke could be genuinely unfunny, but even if it was, a woman is often willing to laugh anyway because she wants the attention and to reciprocate good vibes.
14. Looking at The Door

Anytime a woman keeps checking the door, she wants to leave. Often when someone is uncomfortable and they’re searching for an exit, they look for a way of escape, i.e. the door. It’s best not to push the issue and continue talking if a woman is that anxious to leave.
15. Politely Saying She’s Not Interested

While the idea is supposed to be subtle indicators, you’d be surprised how many guys take “I’m not interested” as “please convince me.” Women do not want to be convinced as to why they should give you their number or let you take them out. The hope is that a simple decline will end the conversation.
Source: (Reddit).