Correção de Informal letter

I really appreciated your letter. I miss you and the whole family.

so, I have been studying English for five years, because this summer I am going to travel to my cousin's house in London. I am going to stay with she and her husband for a few weeks.
I'm planning to work in a good hospital and study in the best English school in England too. Near to go back home, I'd like to go out with some friends to a movie theater or mall because it's my birthday, after that, my boyfriend and I wanna go out together, just we both, for chatting.

How about you, what are your plans for this summer?

I'm looking forward to hearing from you.

Mesmo após a tradução do Henry, gostaria de perguntar o que realmente você quis dizer neste paragrafo:

i am go out with my friends in a movie theater or male because is my birthday, after that my boyfriend and me go out together (just we two) for talking and he missed.

Ficou bem difícil de entender.