** spoiler alert ** 
 First off, it was strange that the book is not meant for young adult readers when the main characters are just 17 and 18. I would have thought you would either change the ages or make it more age appropriate and suitable to the characters maturity. 
 The sexual aspects were quite explicit and while I don't normally mind this, there were quite a few rape scenes I could have been much happier knowing in less detail. I nearly stopped reading altogether after the first rape scene. I've read some dark books before but the sexual overtones to the rape made me uncomfortable. 
 Finally, I really disliked Zeke. He objectified women all the time. He put constant sexual pressure on Patience and actually made it an unstated condition of being in a relationship with her, despite not knowing her very long. After telling her he loved her and hearing that she loved him, he walked out on her and ended up sleeping with some other girl. Even though Patience kept telling the reader he didn't actually cheat since they were not in a 'relationship' when she caught them together she certainly felt like she was cheated on. 
 I also disliked it when Patience and Zeke finally got together. After flirting with some guys at the club where Zeke was playing, Zeke gets all jealous and tells her to stop it even though the last thing we saw was him having sex with another women. This leads to them having sex and of course establishing a relationship now that Patience was putting out. You would hope that the sex would have been romantic and sweet considering Patience's sexual reserve, but instead it was the opposite! 
 It was a little hard to believe this messy relationship was anything but a strong sexual attraction. The romantic aspects of the story were usually sexually focused and they seemed to really only connect on this level. For example, I really felt the love when Zeke defended having sex with the other girl because he 'had needs'. It really sounds like you care about her feelings Zeke.