Though there are some tricks you can pull to make the girl you like be more inclined to miss you, you shouldn't try to make her so jealous that she feels like she shouldn't bother with you because you're a player or because she doesn't want to fight for your affection. While you don't have to tell her where you've been all the time, don't talk about other girls too much or openly flirt with every girl who comes your way unless you want the girl to get annoyed with you. Though some light flirting with other girls can make the girl you like see that you're a catch, you don't want to push it so far that she feels like you don't care about her. If she thinks that you're likely to mess around with other girls when you're away, then she won't miss you very much. If you see her out, you should gather your confidence and give it a minute or two before you go up to her. If you act like you don't see her or she's not cool enough for you, then she won't be jealous of the people you're talking to; she'll just think you're a jerk. As corny as it sounds, at the end of the day, it's important that you be yourself if you really want to win the girl over. You shouldn't try to put on an act or be a guy who you think she'd prefer to you; instead, you should work on letting her see your best attributes and take some time to open up about your more quirky interests. Though you don't need to act the exact same way around her as you would around your buddies, you shouldn't put on an act, either, or she'll be able to see through it eventually. If you really like the girl and want her to miss you, then you should make sure the person she's missing is really you, not some polished version of who you are. Though it can take a while for you to open up and show her who you really are, you should try to be as genuine as possible when you're getting to know each other. Sure, limiting your phone time or the time you spend together and playing a little hard to get can make the girl more interested in you and can make her more likely to miss you. But if you take it too far, then you'll just be confusing the girland may even be confusing yourself in the process. If she feels like your entire relationship is based around mind games and she doesn't really know who you are, then her patience will wear thin pretty fast. If you're kind and affectionate one minute and then cold and distant the next, then she'll quickly get frustrated. Though you don't have to give it all away, if she feels like she has no idea what's going on in your head, she'll start to give up on you. While it's important to leave her wanting more and missing you, you don't want to take playing hard to get so far that she has no idea that you actually do care for her. Even if you're a bit shy, you should tell her that you do like her and that you do want to spend more time with her. Don't let her do all the work, or she may get tired of you because she'll think that you don't really like her. You have to be willing to meet her at least halfway. If you force her to chase you too much, she may go for a guy who is more open with his feelings instead.

Summary:
Don't try too hard to make her jealous. Don't try to be someone else just to win her over. Don't play too many games. Don't be afraid to tell her how you feel about her.