I didn't pay attention to my teacher in class much.
Why didn't you pay attention?
Because I'm think they are wasting my precious time.
It's okay to not pay attention once in a while, but if it turns into a regular habit, your GPA will likely suffer, which is a waste of your time and money. Talk to your teacher and find out what you can do to feel more involved in class.
I wish school wasn't so important, then I could have my precious time to myself.
Not paying attention in class is inconsiderate of your teacher's time as they have other things that they could be doing also. Give your teacher the respect they deserve.