Why he is showing off his new girlfriend?

Me and my ex has broken up 3 weeks ago. he did the breakup due to misunderstanding. i tried to explain but he was sure about his decision. we were in relation for 10 months. after breakup he seemed to be happy but I was suffering. after a week suddenly he got the news that my fily was talking about my marriage. He then texted me that he went come back to me I replied that I dint even want you to be. he then started telling me that he has a girlfriend while I didn't even ask him. i said ok then what should I do. he said I should not disturb him again. i just replied with I will never. nd ask him to block me if he has any issue.. by getting no serious reaction from me he started showing off that she is better than me blah blah. i still replied with nothing. Then he texted me that his girlfriend wanna meet me.. why the hell in the world a boy wants his ex to meet his new chic. it seemed like he was just faking it. i stopped responding to his messages and started putting happy statuses. he was still taunting me that with whom I was riding.. he still was asking me laughingly that have I made a new boyfriend. i ignored every text if him.. then again he asked me to reply him that his girlfriend wants to talk. i can't get why is he showing off if he is happy with his new girlfriend then y is he taunting me? he still has not blocked me and watching my every status.. after getting ignored for 6 times by me he didn't text me after that but still watching my stories..
Any idea guys? I know many of u will tell me to block him but I just wanna ask about his intentions
Why he is showing off his new girlfriend?
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