Notice if she touches you or tries to get closer. When a girl likes you, she will often try to touch you, as this is a noticeable yet still subtle way to flirt. It allows a girl to size up how responsive you are. She may touch your arm when you say something funny, “accidentally” brush your shoulder or hands with hers, or gently place her hand on your knee.
SEE THE REASON LADIES ARE CONSTANTLY REJECTING YOU
Not all girls will feel comfortable reaching out using touch. In this case, don’t assume that she doesn’t like you just because she doesn’t try to touch you. She may be too nervous to do so. If you like her, don’t be shy––break the touch barrier yourself and see how she responds.
She may also find other reasons to touch you, such as softly punching your arm. These “one-of-the-mates” moves can be a thinly disguised way of getting closer to you without it being too evident to your friends and hers.
Pay attention to whether she randomly hugs you. This is especially significant if her random hugs are reserved mostly for you. Hugs are a friendly, affectionate way of getting closer to you and touching you without it necessarily compromising her stealthy flirting skills. Return the hug if you like her back, or gently refuse her hug if you don’t want her to get the wrong impression.
See if she mirrors your moves. If a girl imitates you – for example, if you run your fingers through your hair and you notice her do the same a few seconds later – she may be subconsciously mirroring your movements. This can be a tell that she likes you. 
Notice if she’s playing with her hair. Gently twirling strands of her hair or partaking in other grooming behaviors like running her hands through her hair could be signs of flirting.
Look for signs of nervousness or fidgeting. When a girl likes you, she will touch her lips, collarbone, or neck to draw your attention to these areas. She may even apply lipstick in front of you.
Notice if she smiles around you. This may be her way of signaling to you that she’s comfortable and happy in your presence. When a girl likes you, she may also laugh at your jokes (regardless of how funny they actually are).