伤心的 今天真伤心 or 太难过了 ，but both of them sounds girlish， because boys do not always say they are said。 and i think you should give your password to your girlfriend。 she ask for your password because she loves you ，and i think handsome guys always be srrounded by beautiful girls，but i should say treat your girlfriend truly if you love her ，and once you love one girl，do not hung with others，otherwise you got nothing。

我的女朋友问我关于贴吧的密码。我回答了 说: 为什么? 以后她以为我想隐藏某事物, 但是它不是真的. 现在她不想说我。 那个贴吧是关于他的城市,事件, 工作机会. 也许她以为我说某些姑娘但是它不是真的。她知道我是一个好的男人. 她不应该怀疑. you can write this in english，because i can not understand you very good。

It isn't long time that i study Chinese and i study it by myself without a teacher, then i think your chinese is ok and i guess you are working hard。 I'm still at the beginning. I only know a few words and basic grammar. I used a dictionary in order to write this text, i used words that i didn't know so word usage and sentence structure can be wrong. I hope someone can help me to correct my text. I hope it is understandable, otherwise i can translate it into English.

伤心的

我的女朋友问我关于要贴吧的密码。，我回答了: 为什么? 以后然后，她就以为我想隐藏某事物, 但是它不是真的. 现在她不想搭理说我。 那个贴吧是关于他我的城市,事件, 工作机会. 也许她以为我说在跟某些姑娘聊天，但是它不是真的。她知道我是一个好的男人. 她不应该怀疑.

It isn't long time that i study Chinese and i study it by myself without a teacher, I'm still at the beginning. I only know a few words and basic grammar. I used a dictionary in order to write this text, i used words that i didn't know so word usage and sentence structure can be wrong. I hope someone can help me to correct my text. I hope it is understandable, otherwise i can translate it into English.

伤心的

    我的女朋友问我关于贴吧的密码。，我回答了问她: 为什么? 以后之后她以为我想隐藏隐瞒某事物什么事(it means something), 但是它这并不是真的.。现在她不想说和我说话。那个贴吧是关于他的城市,事件（what do you mean?news?or things? you would use 新闻or事情）,工作机会. 。也许她以为我说在和某些姑娘聊天，但是它这不是真的（the typical expression should be 但这并不是事实）。她知道我是一个好的男人.，她不应该怀疑我。

you should notice more about your punctuation, there is no space after chinese punctuation.

伤心的 了 

我的女朋友问我关于贴吧的密码。 ，我回答了: 。为什么? 以后 因为她以为 觉得我想隐藏 瞒某事物, ，但是它 那不是真的.。现在她不想说 责怪我。，那个贴吧是关于他 她的城市, 、事件 物, 、工作机会. 。也许她以为我说 在和某些姑娘说话，但是它 那不是真的。她知道我是一个好的男人. ，所以她不应该怀疑. 。

It isn't long time that i study Chinese and i study it by myself without a teacher, I'm still at the beginning. I only know a few words and basic grammar. I used a dictionary in order to write this text, i used words that i didn't know so word usage and sentence structure can be wrong. I hope someone can help me to correct my text. I hope it is understandable, otherwise i can translate it into English.