I wouldn't say theres no chance, but it will be tough and heartaching.
I really wish I could hear my ex saying all these, for I am too had been going through what your ex had been. Its not 100% same, but similar indeed.
I'll tell you how I feel and think, and maybe it might point you somewhere.
She ended it around early March (She enjoy going out with her ex so much, she didn't want me to get hurt) but actually keep her distance mid April. After she stopped making me a top priority. She doesn't call, text (unless I go first), and she didn't even want to meet me when she came to my town.(5 minutes from my home). I tried getting back, I tried telling her how I was still want her, I even tried giving her a second chance (silly). But the answer is still no.
So after a while, I know I need to move on, so for about 2 months I was not myself, well I was everything negative you could think of. It was hard,
really hard.
About a week ago, suddenly out of the blue, she texted me for once. Long story shot, she talked like nothing happened for the last 2 months. I got sad and frustrated, and I told her how I was, and how horrible she injured me. Maybe she got the wrong idea of me, or she thought I hated her. Honestly, I could never ever hate her, I would never want her to go through what I've been through, and yes, I still love her. But I don't want to be with her.
So when he said he didn't love you anymore, I think that is his ego, not the heart. You've gotta put in some effort if you want it to work again. I was only together for 2 years, you were longer. You must know his likes and dislikes, his personality, its time to put those in good use. Winning someone's heart back is not impossible, I've seen this. But its all about how bad you really want him back. Don't even for one second thinking of making him chase you again and stop chasing him yourself. Because he might just turn around and leave.