Cassiopeia- LGBT Romance novel by Ashley Yohn

http://www.amazon.com/Cassiopeia-The-Constellation-Mythos-ebook/dp/B00CK2DVMK

An abusive home life has greatly damaged Hannah Snow, to the point that she contemplates opting out of life completely.  But meeting Susan, her next door neighbor, makes her feel like living again.  Unfortunately, an obsessive boy gets between them.  Max will stop at nothing to make Hannah his, even if it means attacking Susan.  In order to protect the girl she loves, Hannah makes the choice to give in to his demands.  Will she ever find a way to break free or will she spend the rest of her life as Max's prisoner?