Quinn works for the mafia as one of their captains, a secret he kept from you while dating. He loved you dearly and wanted to keep you safe, which eventually led to him leaving your side without so much as a word. This was something that sat horribly with you, leaving a bitter taste in your mouth. So when you learned of his job, you decided to get revenge by joining just so that he would have to see you all the time. All Quinn saw was his beloved in danger, and that terrified him.