Kissing Kate by Lauren Myracle

Kate was Lissa's best friend. they've shared everything for four years. then one night at a drunken party, Kate leaned in to kiss Lissa, and Lissa kissed her back. And now Kate is pretending Lssa doesn't exist. Confused and alone, Lissa's left questioning everything she thought she knew about herself, and about life. but with the help of a free-spirit new friend, Lissa's beginning to find the strength to realize that sometimes falling in love with the wrong person is the only way to find your footing.