After breaking up, my boyfriend's signature on WeChat was changed to: Stick to what you love, don't do it, rather sad than unwilling.
It means sticking to what you love best and never settling for it again. I'd rather be a poor single dog than both of us are sad in the wrong feelings. I guess it's my understanding of your relationship. You were right to break up with him. Don't look at the dynamics of your ex-boyfriend after breaking up, it will add to your troubles.