Hi & welcome Emma Giovanna
I want my ex back. I don't know what's with him .... back in Sept. of last year he was crazy about me.
we started dating in Nov ... he broke up with me after a month
I was the one that didn't made it work out ...
He would try and get my attention and ... I would talk with boys.
He would look at me a lot ... I would just ignore him ...
.. during Christmas vacations I NEVER contacted him.
He once called me, but I refused to get the call.
when I got back to school (this week) .... he started noticing me a lot.
He .... would sit by me, and ... try to get my attention ....
he doesn't go around flirting with girls.
This is my interpretation of the situation:
~ The boy likes you, thinks that you may be interested, but is not going to call himself your 'boyfriend' if he feels that you are not even bothered to answer his phone call over the Christmas holiday.
The question now is: ~ do you care for him enough, to be his girlfriend, and not leave him feeling silly and unwanted?
You say that you were
'falling more and more in love with him' and that he was becoming
'less interested in' you, yet he was trying to attract your attention, getting jealous of other boys you spoke to, phoning you at Christmas ~ what was he
not doing, to make you think that he was becoming less interested?
And how were you communicating to him that you were falling for him?
~ By flirting with other boys, ignoring him, and refusing to take his phone calls?
Have another read of your post ~ and think about the way he has behaved, and the way you have behaved.
Try to put yourself in his place, and him in yours.
What went wrong, do you think?
You are both at school, so may still be quite young.
Young romances are full of flirting, misunderstanding, awkwardness, etc. That seems to be the norm.
But a lot of young people are hurt by misunderstanding how the one they like really feels.
If you are still very young, be sure that your parents / guardians are happy for you to be in a relationship and, if they are, and you genuinely like this boy, try to be clear about how you feel, by being honest & friendly ~ and try not to upset him, by ignoring him while you flirt with other boys, etc.
You say that you 'always act happy' ~ is this part of the 'flirting' with other boys?
If so, then be sure that he understands that you are just being your lively and friendly self with them, and that you are not trying to ignore or upset him ~ as long as that is the truth, of course.
Have a chat with him & try to sort things out a bit.
Good luck!