Do they really try to come back?

My ex Narc broke up with me 6 weeks ago after dating for almost 6 years. I found out a month after that he left me because he already had a new girlfriend and was "in love" with her --someone else we worked with. Now he's completely blocked me, made it impossible to see me at work, and is madly in love with her. I know this side of him, he did it with me when his wife was dying of breast cancer. It's heartbreaking to think he can just forget about me and move on so quickly. There doesn't seem a chance that he'll ever look back and contact me, he never looks back and shows remorse. Am I crazy to read other posts on here and think it might? there's a part of me that just wants to know that he is at least thinking of me, but another part that knows it's for the best. But a part of me wants him to at least miss me and want me back....