i am sad

Today when i wake up of morning and i stay in bed because i have the flu Last night .and i went out with my friend Gianluca and i walked along street of Cagliari talking with him. it was bitterly cold and for this reason i feel sick now I hate stay at home because it's boring. i like go out my friends and i like run while listening to music or go to the university. I have cough for this reason i drink a cup of hot tea and i relax on the couch.

Be sure to use periods to separate your sentences And to capitalize "I" always.

here it is, sentence by sentence, with explanations.

I am sad. [Capitalize always "I" and the first word in a sentence.]

today, when I woke up, I stayed in bed because I have the flu.  [use past tense]

Last night, I went out with my friend Gianluca and walked along the streets of Cagliari talking with him. [Good. Only small changes]

It was bitterly cold, and I think this is the reason I feel sick now. [Good. I only changed it to be smoother.]

I hate to stay at home because it's boring. [here you need the "to" because its the object of the main verb "hate". You can directly translate "Non mi piace stare ..." ]

I like to go out with my friends, to run while listening to music, and to go to the university. [We need the "to" just like above. You have a list of what you like, so it's smoother to combine them this way rather than using "and" repeatedly.]

I have a cough for this reason. [You need the "a". Also, this sentence makes more sense when combined with the one above: "... and I think this is the reason I feel sick and have a cough now."]

I am drinking a cup of hot tea, and I am relaxing on the couch. [You need the "-ing" firms here because it's happening while you are writing this.]

Spero che quello sia utile.