Have you met his ex? Or spoken to her? If not, how do you know she knows about you?
Plus, if he is separated from the mother of his child, I think it’s still highly likely that you are not his only ‘girlfriend’. He might not be with his ex, but he is almost certainly with someone who isn’t you.
However, even if he’s single, that doesn’t actually matter because he is a horrible arsehole who makes you miserable. Why are you wasting years of your life on a nasty piece of work who doesn’t give a shit about you? Are you scared to be without a boyfriend? Are you some of masochist who secretly gets off on the humiliation?
What do you actually want to get out of your threads? Everyone has told you, repeatedly, that your boyfriend is treating you like shit and lying to you. He doesn’t love you. You know that. He makes you unhappy and downtrodden. You know that too. What more, exactly, do want people to say? Are you looking for people to reassure you and tell you to hang in there and that your boyfriend loves you? Because nobody is going to do that, and if we did do that, we’d be terrible people - no decent human being is going to tell you to stay with a man who is an emotionally abusive, cruel, manipulative liar.
I understand that you think people are being rude and harsh, but why you think that is? It’s not because anyone wants to bully you - quite the opposite. It’s because everyone can see that you’re being reduced to an awful state by this man and everyone wants you to wake up, walk away and get your bloody dignity back and be happy. You said in your other thread that you’re a strong independent woman, but right now, you are not. You were a strong independent woman before you met this man but not any more. And everyone here simply wants to see you be that strong independent woman again. You KNOW you are better than this.