My Hobbies

I'm an active (a activity) girl (in my life. I) and love playing sport (doing some sports),singing songs and watching football games. My favorite team is Juventus, which is a team in Serie A, and I think Buffon is the best keeper in the world!
I like reading English novels and watching American dramas too. If you have the same hobbies as (with) me, I'd like to be your friend!

Good start. Activity is a noun. so you should use the adjective form - active. Your sentences 1 and 2 and also 3 and 4 sound more natural if they combined (change from four to two sentences.). We use the phrase 'same as'. eg... 'she is studying the same subject as me'.