Написать несколько предложений на тему my problems in english

I like English very much and I really need it, but I don't know how to improve it, specially in listening and speaking. I hope you can give me some suggestions after knowing about my status which can be seen as follow.

I'm working for an international company, and my working language is English. I can read and write very well, but Everytime I report to my foreigner boss who comes from Germany, I feel very bad. I can't express myself very well and when he spoke fast, I even didn't understand what he said.

In fact, I learn English very hard. I listen to English materials and practise expressing myself in English (no partner, just me to me) very day. But I can't find my progress.