increase my level

I have to be more diligent in my learning of languages because I repeat always repeat all the same mistakes. Then, I have not been improving my English for a long time. I must pay more attention when I write an entry to be able to avoid mistakes. Most of the time, I make errors that I would be able to correct easily. The level of my writing is not high enough. I should not write as I speak. I should use a higher range of vocabulary and the grammar should be higher (or "better") too. On the other hand, it is something very difficult to reach. I must spend a long period of time if I want to reach a good level of writing.

Your English is very good! I understand your desire to improve (I'm "in the same boat" with French), but I think it just takes time, as you said.