You should be able to add your blog by searching for its full URL (i.e. patrikring.blogg.se) using the Bloglovin search (located at the top of the page).
If Bloglovin' fails to find your blog it might be due to a problem with your blog's RSS feed. See "How do I check if my RSS feed is valid?" for instructions how to check this.
If you still can't add your blog, please contact support and we will help you as soon as possible.