well, lets see this helps...

I was one like you... dump by someone who no longer love me...
it took me 3 years for full recovery, and now i am still so much alive and happy...

one thing i found out was, the main thing why we cant forget the ex who dumpe us is because we dont have a single idea why he did it that way, even though we have tried our best effort...

sometimes it is not that we still love him... sometimes it is the reason we cannot reason out that make us cannot move on. you have few options to forget him:

i. try to tell yourself he is no longer worth your love... what for love for someone who dont love u anymore?
ii. convince yourself you are not the reason of the breakup, he wanted it because he has his issues... not you...
iii. you can cry anytime you want... letting it out is the best way to forget an idiot *opps*

try to commit yourself to your wonderfully understanding boyfriend now... from the way your mentioned, he is much better and there for you...