There are several classic mistakes a girl makes that can drive a guy away in no time at all, even if things are going great. When you want to lose a guy on purpose, use the following techniques to drive him crazy and get rid of him with no hurt feelings.

a. Call him every 15 to 30 minutes when he goes out with the guys. Tell him you're just calling to check in, hear his voice or find out if he misses you. Guys hate it when women are clingy and needy.

b. Leave your things all over his place as if you are moving in. This will freak him out, especially if they are particularly girly things like lip gloss, lotion, romance novels and tampons.

c. Talk constantly about your ex-boyfriends. To guys, it doesn't matter whether you say good or bad things about these exes. Guys do not want to hear about it at all. Either way, it conjures up feelings in insecurity, inadequacy and jealousy.

d. Plan your future together--this is a great way to lose a guy on purpose. Ask where he sees himself in five years and talk about what your future together will be like. Tell him how many children you want to have along with the names you like.

e. Tell the guy you hate his friends. Tell him they are losers. Take it a step further and forbid him to see them anymore. Give him an ultimatum that he must choose between you and them.

f. Share all of your previous sexual escapades with him in detail. Guys are so jealous that the thought of you with someone else will disgust him. It will also make him feel inferior and inadequate in relation to the quantity and quality of his own experience.