I'd like to join in. 
I might be able to point out a few mistakes if I see them as I was able to speak reasonably fluent English over the last years (had to talk in English at work and with my partner back then) but as usual, once you stop talking everyday, you start forgetting.
So it might be a good exercise for me, too. Watching movies/series in English is a good idea. Also, try to read books! There's a whole lot of grammar you learn from them, and it helps to develop a feeling for a sentence to "sound right".
I can absolutely recommend watching GoT as well
It's my favorite series - and regarding the tower scene? Epic birth of J.S. if you ask me xD
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"Are u play guild wars 2 in english?" => Are you playing Guild Wars 2 in English. (look up "Present Continuous"). Also, use a capital letter for countries & languages, e.g. German, English.