how if my ex bf very strict and difficult,i neeed some advices

Hi guys,me and my bf have broken up 2 weeks ago,but he is very strict,serious and difficutl when decide break up me,he make sure 100% i dont have any chance to back,we had 8 months together and was very happy,then i made some mistake make him sad, lost his belief about love and disappointed about me,the first time we had troubles,its my mistake and he gave me a chance,i tried to make it well but then we debate and arguing about some troubles we had,and he said he loves me but we are different and not right for each other,break up is the best way for both,i know i still love him abd before always good,just some troubles and mistake i did make him think like that and he feels can not see our future and in the future we always see the different ways,and seems im not interested in his life,his world,im sure i want with him do all things in the future,we are come from 2 countries differents,english is not my native language,but both try to adapt well.Because of love me,then he stayed here longer,and one year he doesnt back his family and meet parents.the problem is he stay here because of me,he study my language,he makes me happy everyday,adapt cultures and somethings here,i also try to be good gf,i know just because sometimes when arguing or angry,i made mistake and say somethings make him hurt,if he doenst love me then he never can do all things like that,and made our plan in the future,and want i study english,visit his country.Just because i try to arrange time and money for all plan.And now,he said its too late,he doenst want anything,he feels tired and next year he will back his country,im the kind of girl always simpify everything and easy to forget all things,but he is a bit sensitive and always thinks a lot…Im so sad when we break up,and he decided very strong.After broke,i did some stupid things before i read this website like text,call, and even go to meet him and try to convince,but no result,now i dont say anything and follow the No contact,but he is the kind is very serious,difficult,he said chance one time,but the second time just small things,why he can so strict like that,so how i can do now?i never want lose a good bf like that,and all above,i really love him!!! I neeed some advices,sorry my english is not well.