If you don’t mind can you please help with my sentences??

I want to know the most natural way to say

1.I have to return the books that I borrowed from library two weeks ago but still I’ve been reading it and I’m pretty sure that I’m not able to finish these until tomorrow.

2.I don’t want to waste my time by doing stupid things such as picking out my clothes.

3.Since I started learning English, I’ve never hung out with other people.

4.Using “get” is pretty hard however, if I were able to use get well, my English sound would be more nature.

5.I’ve never ever obsessed with something this much hard before.