Get to know the girl you are interested in first. Do your best to become her friend or to have mutual friends with her. Give her a good first impression. Remember no girl wants to go out with some guy she doesn't like. Chat with her or her friends to find out whether she likes you and whether she already has a boyfriend. If she doesn't like you or is not available, don't bother asking her out because you will probably get rejected.

Ask her out yourself. If you have decided to ask her out, you should do it personally. Don't ask or pay someone else do it for you because they may not keep secrets or they may make jokes about it later. Also you will show her that you are sincere when you ask her out by yourself. Doing it this way will get you a better chance of success.

You can ask her out in person, via instant messaging or on the phone. Many girls like face-to-face talks because they feel respected that way. Get some privacy when you do it. You don't want to embarrass her or yourself. You don't want other people's opinions, particularly her friends' opinions, influencing her decision. Never ask her out in front of other people.

If you ask her out in person, be serious. Don't give her the wrong impression that you are joking. If she says "yes", don't be too excited. Be cool. Give her a sweet smile. If she said "no", don't feel humiliated or too gloomy. It is normal. There are many reasons why she would say no, or perhaps there is no reason at all. She may change her mind later. So if she turns you down, be polite because you may win her back later. The most important thing is that after learning how to ask a girl out in the middle school, you need to get a plan and do it. Be brave and be cool.