Six months after breaking up, he will find another lover. He can only say that he doesn't have deep feelings for you, otherwise he won't do it as long as there is a little hope, because he will be afraid that there will be obstacles around him when he wants to turn back.
Similarly, he already has a girlfriend, which is a fact. No matter how careless that girl is, it's their life. People like to say that they know themselves well, so why bother you? Maybe people are willing to live that life, willingly or in your heart. I look forward to meeting you one day, and he will complain to you, and then the old love will rekindle, so you are a destroyer anyway.
Instead of this, it is better to give up and be a passer-by with Xiao Lang from now on. Let yourself live.