Please help me! Teenage crisis going on!

First of all stop crying. Tears will get you no where and no where is not where you want to be right now. I'm sorry this boy betrayed you so quickly, obviously he has the patience of a small child and probably the brain to match to miss out on a chance like you.
Don't be too down-hearted, he'll soon realise what he's missing. It's a shame it came and went so quickly that it seemed over before it began but that's life for you honey, nothing ever works out the way you want it to until you grab the touro por the horns so to speak.

If you two are still friends then i suggest you go talk to him, take him out on a bike-ride, to get something to eat or a simple movie night at início where you can be alone and talk about things in privacy. Tell him you still have feelings for him, but you don't want those feelings to get in the way of the friendship you have now. You must ask him why he turned away so quickly as there has to be a reason but don't push this too hard as most boys will be uncomfortable about admitting things like this. If he doesn't want to say, there's no harm in pushing a little but not too far as that could destroy the friendship like he destroyed the relationship. If he says the reason was because you couldn't see him out of school explain things to him, tell him why and see if he understands. If he doesn't, i must admit, he's not worth thinking about.

In fact, and i'm sorry if my words hurt you, but if this boy is callous enough to go out with you for a week, break up with you for no reason and then THE VERY seguinte dia take a girl out to the movies, then he was never truly interested in the first place and i think that's not just a terrible shame but a moronic thing to do. His actions have now caused riffs in your friendship and hurt your feelings, and in my eyes, no boy is worth that much pain.

However think about this - was that girl worth anything to him? She could have been a normal friend such as you are to him, she also could have been a cousin, an ex-girlfriend he's friends with, maybe even a class mate etc.
Get your facts right before you go armas blazing as if you don't and you confront him with it you could look foolish.

However if things don't go according to plan and he's not interested in being your boyfriend or you friend any longer - forget him and get on with your life. Boys will come and go in your life and someday you'll find Mr. Right anyway, so don't be too tied to this boy.
His actions are horrendous and i have an immediate dislike to him even though i have never met him and probably never will. But boys who act like that are no good to anyone in my opinion. You'll just end up getting hurt i think.

but try anyway, see how it goes, and if not...it's his loss, not yours honey.

Good luck.

im guessing the best thing to do is tell him or one of ur bestfiends
u guys are friends right??
but its kinda mean that u guys only dated 4 a week and took a girl eo da filmes after u guys broke up
and if things dont wotk out between u and him then 4get about him and stop ctying over him cuz its only gonna make things worse

Well, he has obviously moved on, so I think you should respect that. Telling him what you feel might make it harder for him.

Personally, I think you should tell him and let him no how you feel. If you dont there will be a ton of 'What Ifs' that you'll be stuck wondering about. You said he was the estrela of the basquetebol, basquete team.. sounds like he's come a long way form 'cootie boy' to 'cool guy who plays b-ball'. Has he changed? Theres a big jump from Elementary School to Middle School... But you should definitely tell him (in my opinion)..

stop crying this boy of yours has liked you but now he doesnt so get your head out of fantasia land and forget about him