How can I ask a girl out without seeming needy?

There is no limit on trying again. The next time you try though, be plain, simple, and to the point in letting her know how you feel while explaining that if she really is not interested, you will not "harass" her anymore. If she does seem angry, you will unfortunately have to call it quits on her ... Good Luck! ☺

I don't know much about getting chicks, but four things I do know are very useful tricks. Don't square your body to her too early as it makes you seem needy, let her do the talking and look at her lips after a bit of her talking. Try not to start a conversation but do something that triggers one, like helping with homework, or lending her money or something. Ideally, it would be better to help her out a couple of times without saying anything as it makes you seem like a nice guy that doesn't want anything back, and then on the 3rd or 4th time, start a conversation and then after that spend more time with her ALONE to lower the risk of friendzone and eventually ask her out.

Well it sorta depends on how she reacted when you asked her out? If she said no straight away without hesitating then sorry I think she might just not like you that way. Do you know if she likes you back? If you think she does, try hanging out with her more or talking more, don't ask her out straight away, try to build a friendship first, but don't let yourself fall into the friend zone if that makes any sense? Find something your both interested in(eg. a sport, such as soccer) and talk about that, make her laugh, tease her ect.

Sorry if that didn't make much sense or didn't really help haha :)

Idk if you're who I think you are but anyway good luck

probably i don't know her course and that bout if she likes you... then yea bit idk it don't seem it with that info.... sorry hope you find what your looking for :) if she sad no both times with out thinking about it then its probably a not if not then maybe but get to know her as a friend and see where you go from there id say hope i helped