In English, when I had a B2 level (I'm probably still there but definitely closer to C1 than before), I reached a Plateau in which I couldn't progress much. I would read books, watch series without subtitles, had a phew video meetings with US people, but I was stuck in the same level (I improved a little but not much). So I would have no option but to sit down, study and prepare for the FCE. I think it was useful, after that I continued enhancing my level of English, but it was truly difficult since I hate studying with books and preparing for exams. Anyway, that was a time that I didn't enjoy much, in spite of my high interest in the language. Thank you for reading, I'm looking forward to hearing your struggles with language learning!