So you find yourself steeping in ennui. Reading is a chore. Books are a chore (and too heavy to carry, anyway, and why even bother, and you don't even read them when you're out). Life is a chore and nothing makes sense anymore, and how did you ever even manage to finish a book?
The bad news is, you have been diagnosed with a troubling case of The Reading Slump (TRS for short). The good news is, you are in excellent company.
Also, there are ways to manage the condition and lessen its symptoms. The Reading Slump, while recurring, is not chronic. You might yet come out on the other side a reader again.