I have been single for one month and a half... My boyfriend broke up with me without telling me the reasons, till this day I really don't know what happen... Our relationship was really complicated because his ex girlfriend is pregnant of him, but I stayed on his side... He told me that he's not in love with any other girl nor that he's going back to his ex... But he's a different man, every time we talk he's aggressive, he acts like I've done something to him, like he hates me...

And I can't really understand... So I told him that I don't want to talk to him never again...
I'm sure that time will heal it, but right now I just miss him badly, and I can't stop thinking about him, worst is that I

"And i can't really understand" - what you need to realize and what you need to be truthful to yourself is that you cannot control how anyone else feels. You can't control his feelings, his emotions, or his thoughts. The only thing you are in control of is how you react to what has happened. Don't let others determine your day is going to be crappy. People fall out of love and he doesn't really have to give you a reason. Would it make a difference anyway? Control your own emotions and decide to have a good day and move on. You do that by filling your day with fun things to do. Go out with a girlfriend you haven't done anything with for a while. Trust me it works. Soon you will be feeling okay. We have all been through breakups and we have all survived them.

"So i told him that i don't wanna talk to him never again..." That is another good step. See you are already on your way.

Yes I totally agree with you, and I'm trying hardly to move on... But the problem is that I'm in a foreign country away from my family and friends... And the worst is that deep down I still believe that he'll come back to me...
But I'm trying my best to forget him, I start going to gym and I'll start a new course in two weeks... I've also been heartbroken before, actually many times... But this time it really affected me...

"i start going to gym and i'll start a new course in two weeks..." Those are excellent steps forward. And it is fine that you are in another country. There are other ways to make friends there too.

"I've also been heartbroken before, actually many times... But this time it really affected me..." And you survived those. This time really affected you? I am willing to bet that those times affected you as well. You have just had the luxury of time and the luxury of new relationships to minimize that pain which at the time was probably just as bad as this one.

Again - you will be fine regardless of what the future holds. Given the choice of having a good day or a bad day, why wouldn't we always choose to have a good day? I know I choose to have a good day daily, and you can to.

He has another girl pregnant, ( but can't stand her ?) how is he going to see her every week, when he goes to visit his child,

He is angry and aggressive with you.

What I don't understand is what the problem is, you should be happy to get rid of this person

" you will be fine regardless of what the future holds. Given the choice of having a good day or a bad day, why wouldn't we always choose to have a good day? I know I choose to have a good day daily, and you can to..." Thank you so much you really help me... Its not easy but I'll do my best... :)

You just made see things in a different way... I geez that I'm so focus on having him back, cause we had amazing moments together, and it was hard for me to understand that things have changed... He has changed... So I don't want this new guy... And I have to face it the old one is not coming back... Period!!