How to get over strong rejection?

How to overcome really strong rejection from man's side? We had a romance for 3 months, and then everything changed, he began to neglect me. His rejection probably started because of my annoyance, but I just wanted to be more close to him. The more im trying to prove I'm not that bad he thinks, the more worse the situation becomes. And now he doesn't want me to see and hear, and is very stubborn about his decision regarding me. Even I'm trying to talk to him at least by phone, but he hangs up the phone or switch it off, when see that im calling. Maybe the time is the best healer, but I tried that, and it doesn't work. And to give him more time to think, I just afraid that will loose him at all. He is very closed and doesn't tell me why he acts like that, and he fears to love again ,because of his last experience, as he said. How can I win his confidence back , or at least how can I make him talk to me?

how long has it been since you've stopped seeing him or speaking to him? maybe he needs time to think and that could take well over a month. you don't want to be in a relationship with someone that does not value you though. Independence is an attractive quality in anyone. If you did nothing to lose his confidence (you didn't betray him or hurt him) you don't owe him anything, you probably shouldn't be trying to win his confidence back.

thx for advice, Murderface. i really trying to keep myself in hands, in order not to call him , or write him messages..but its very hard when u are not understanding the reason of such an attitude and u don't even imagine how to get over it... but now i knew that the reason of all his strange behaviour , and his often changes in his mood was because of that he still loves his ex gf..i thought he is like some kind of "macho" and found a new and more interesting victim...but , it clarified now, he still loves his ex gf...with whom he decided not to be together anymore, before he got aquainted with me..he said that she is an awful person, and did a lot of harm to him, hurt his true feelings to her..so now im understanding his often changes of mood, that was because of her, probably he missed her from time to time, but didn't want to notice that, or just tried to avoid these feelings...and now he told that still love her...first thing that came to my mind was finaly understanding of everything and i felt even relief and calm for some time..i wrote him sincerely, that i m glad for him and for that he still love her..and said that i thought he wanted to hurt me because it was pleasant for him but i know the reason. and also told him that im sure that he will be with her for sure again, appologized again for that I was irritating him with my stupid messages all the time, and said that he may wrote me if he wants some day....the answer was very short: "i don't know, we will see"...i truly understand the situation in which he is stuck and that i could help him if he just let me!!..even just as friend..i just cant live not to communicate with him...he is still not happy with her,i see that, because he closed almost from everybody of his surrounding now..i know that probably me happend to be as some kind of remedy for him just for some time, and now he again wants to win her back..
its like im feeling him , i know his character is almost like mine, im feeling that we would be good together,really good!and i am not afraid of anything anymore!and i just know that i could give him what he wants!but unfortunately he doesn't want even talk with me by mail!yes i was behaving myself stupid, like little depressed girl, but i changed! and why he doesn't want to give me another chance! why!
i have been in many difficult situations connected with relationships through my life, but harder or not it was, i knew how to deal with that, and i could let it go and fall in love again...but here i see that its not under my control anymore, and i dont want to meet anyone else, i think i found wat i want, im ready to wait, or go to any compromises, but i really afraid that i will loose him forever if i will not do anyhting now...