How to handle a book recommendation you aren't enjoying?

Hey Y'all.

I was just wondering how you all go about handling a recommendation of a book that is just...not for you.

I am rather particular about the books that I read. However a love of books is how I relate to quite a few people in my life, and I frequently get recommendations from them. And while I do give these books a try I find I often really struggle to get into them.

Currently I am reading a book recommended to me by a friend and have a bad feeling about whether I'll be able to finish it.

I feel terrible, because my friend GUSHED about this book to me and seemed certain I would be unable to put it down. When, in truth, I am struggling to get through it.

I feel that I am letting my friends down by being unable to finish the books they recommend to me. Does anyone have any advice as to how to handle this situation? Cause I find myself in it far too often I think.