I'm like that, too, and it's really a shame. My book addiction, though, is part of a larger problem. I just feel comfort and ease spending money. It's therapeutic for me. Spending money makes me feel good, whether it's $5 or $500.
Now when it comes to books.... SMH.... first of all, as you guys know, I'm in an accelerated program, which means I'm taking two to three 3-credit classes in 8 weeks. That's a LOT of reading. I have zero time to read "fun" stuff right now, but that hasn't stopped me from buying every single book that has been recommended on this site (minus the sci-fi type of books). Anything that's Christian or self-help, I've bought it. Have I read it? Of course not. Do I expect to be able to read it at any point in the next year? Probably not. But, I have it.
AND THOSE DOGGONE BOOKSTORES ARE THE WORST!!!! The last time I went in one, a few weeks ago, I ended up buying a book for me, books for my niece (who is an avid reader, at 6), journals for gifts, and a set of book ends. Oh, I also bought some gong gadget that I thought was pretty cool. I guess it looks good on my desk or something, Idk... but yeah, me and bookstores really shouldn't spend a lot of time together.