Okay I read Ugly Love. I think I liked Hopeless more, but then there were three books for Hopeless. Ugly Love is done and dusted in one book and Colleen Hoover is amazing at making you fall in love with the romance <3
BUT, I just have to warn you since you're not 18 yet it is INCREDIBLY smutty! Like, every chapter. So make sure you're okay with that first :D
If you're good to go, then enjoy Miles & Tate <3