Disclaimer: I think you already know what I'm going to say...
Honestly—Vota
Kevin had changed. He wasn't on the bad-side anymore. He didn't do any illegal deals anymore (okay, not as many). He was mostly a different person. Why couldn't Gwen see that?
Why couldn't she see what mercy had done? It had given him a chance to completely start a new life, one of which, he was proud of.
Why couldn't she see what love had won? He loved her like no other, it was just that he had an incredibly hard time of showing it. The thought of being her boyfriend was what basically kept him on track of being a better person. How could she not see that his one, that's right, one, weakness was her? Little did Ben and she know, Kevin always watched her out of the corner of his eye. When she went down, or got smashed into a stack of crates or something, it was Kevin who was immediately by her side, covering for her until she got back up and started fighting again. Even then, he would still battle close to her, just in case.
How can she honestly see, if she couldn't see how much Kevin loved her?