You may already know this info, but if not, it’ll come in handy when deciding when or if to ask her out. Pay attention to the people she talks about often. If they aren’t regular friends of hers, it may be someone she is interested in romantically. Check out her social media to see if there are any clues there, too. You could even turn this into an opportunity to get to know her better by asking something like, “Tell me more about some of the people you’ve dated,” or “Did your last relationship end well?” When someone looks at your frequently, that can often mean that they’re interested in you. Especially if you are already friends, this can be a great indicator that she may be developing feelings for you. If you don’t notice this, it doesn’t mean that she isn’t interested or that you shouldn’t ask her out. It’s just one way you might be able to tell if her feelings toward you have changed. Does she approach you and stand or sit near you? Does she touch your arm or shoulder? These signs may not mean that she likes you romantically, but they show that she doesn’t dislike you. They mean she is comfortable around you and generally likes you as a person. This is a great sign!  Your chances of getting a “yes” when you ask her out are much higher if a girl likes you as a person. On the flip side, if she avoids you, doesn’t make eye contact, or moves away when you’re close by, those are clear signs that she doesn’t want to spend time with you. with her to see if she responds positively. Make longer-than-usual eye contact and smile at her. Touch her gently on the arm or shoulder to make physical contact. Compliment her looks and her intelligence. To compliment a girl, you could say something like, “That sweater brings out the color of your eyes,” or “You did a great job on your presentation today. I wish I could speak in front of people like you.”

Summary:
Find out if she is already dating or interested in someone else. Check to see if you catch her staring at you. Observe her body language to tell if she is interested in you or not. Flirt