Apperantly, I can't do it...

It sounds to me that you might also be perceiving your current studying to be related more to studying itself than fully enjoying the content. My advice for that would be that you're doing great for your later semesters, but just continue on with a few games and some Facebook first since you're going to have to step up in your later semesters anyway and it's not fun to be too ahead as the boredom will bug you. In general you should always pace yourself and allocate more time for your studies whenever you need it; a few hours spent studying and revising is good enough so that it doesn't clash with paper writing time.

You can also check out the Project Gutenberg website for books and download them onto your Kindle; that should help you to save money for more books as well.