what 's up today?

Hi guys,
Today my sister came to my house and I cooked for her. I prepared the soup because we both felt sick, but she didn't like it. Instead, she ate the pasta (that) my mother cooked for my father and my brother. Then, I studied German all day from 11 in the morning until 6 in the evening. At this moment I am very tired and a little bit unhappy and because of that I will watch my favourite telefilm: Once upon a time. I like watching this fable, because there is (hope endin (what do you mean?) and there are many/a lot of the beautiful boys too much :) Tomorrow, I will return to the student's home. Tomorrow afternoon, I will study German too. My head is about to explode.
Help me please!
Bye bye.

Pretty well done, dear! Most of these are just minor mistakes. Though, remind to always use a capital when you use: 'I'. You say: 'my head is about to explode' because it doesn't actually, literally, explode, but it feels like it is going to. 
I hope I helped you a little.
You did well. Keep practicing!  

what 's up today?

Hi guys,
Today, my sister came at to my house and i I cooked for her. i I prepareted prepared the soup because we both felt sick, but she didn't like it so she ate Pasta that my mother cooked for my father and my brother, then i studied german German all day from 11 in the morning until 6 in the evenig evening. In this moment Right now I am very tired and a little bit unhappy. For this reason So, i will watch my favorite telefilm movie: Once Upon a Time. i like watching the fable because there is hope endin a hopeful ending and there are the beautiful boys, too much :) Tomorrow, i will come back at student's home go back to the dorm (you mean student housing? That is called a dorm). Tomorrow afternoon i will studied still continue studying German. My head explodes is going to explode.
Help me, please!
Bye bye.

what 's up today?

Hi guys,
Today my sister came at my house and i cooked for her. i prepareted the soup because both felt sick, but she didn't like it so she ate Pasta that my mother cooked for my father and my brother, then i studied german all day from 11 in the morning until 6 in the evenig. In this moment i am very tired and a little bit unhappy. For this reason i will watch my favorite telefilm: once upon a time. i like watching the fable because there is happy ending and there are the beautiful boys too much :) Tomorrow i will come back at student's home. Tomorrow afternoon i will studied still German. My head explodes.
Help me please!
Bye bye.