Not able to read fantasy

Has it ever happened to you that you just can't get into fantasy novels? I’m an avid reader, but these days, I find it really tough to stick with one. I’ve tried a few, but after about 30 pages, I end up quitting. Strangely enough, I have no problem finishing nonfiction books. Is this just a phase, or am I growing out of fantasy? Has anyone else experienced this?