My ex is sooooo ANNOYING? How can I stop myself from slapping this kid?

[XoxopoptartprincessXX]

So, I broke up with my abusive, cheating lying ex of three years about 2 months ago. ( he always broke up with me before this and made me beg and cry for him to come back, he even kicked me out of our house when i had no where to go and put his hands on me all because he was angry that his boss yelled at him at work). After our breakup he cursed me out and told me how he never loved me and how disposable I was. I left him alone and never came back like i usually do.I completely ignore his existence till this day. He later spread rumors about how I cheated on HIM which is a complete lie as i've never done that. I was the best girlfriend to him, even his family wanted us to marry. He ruined my relationship with a lot of mutual friends and family with his rumors but I tried being mature and letting it go. I ignored his annoyances and he blocked me on facebook. He also asked a mutual friend to tell me to give him his stuff back, which i neatly packed and left at his front door the day after he asked for his stuff back. He recently unblocked me and made his profile public as I could see him having a "great" life and reaading and flirting with all the girls he cheated on me with. Now he's seeing this other girl, she's not attractive at all, she is everything he said he would never date physically (no offense i'm really not shallow i just have to make it a point) but she lives in my apartment complex. It doesn't help either walking around giving me and attitude and dirty looking me like i did something to her. I'm always polite to her but she's always snickering and grilling me. I think that's so petty on her part. I don't want him back at all, he's all hers. I encounter him sooo many times throughout the week going to her apartment, they hang out in my building a lot. Also when i see him in public he purposely passes me like 4 times for no apparent reason (its obvious) but i pretend i don't see him. I ignore him like he doesn't even exist. He tries to show this new girl off to me indirectly but i don't even look, i'm honestly not even jealous I just want to know what his deal is. A few days ago, his friend (that I never usually talk to) called me to interrogate me about my breakup because apparently a mutual friend told my ex that I told her to tell my ex I asked about him (i never asked about my ex I want nothing to do with him) and told me that my ex called my old phone number (i changed my number after the breakup). Also the friend tells me over the phone that my ex was upset but he sounded like he wanted to speak to me. Also asking if i'm over him and I said yes I am and also asked if I was seeing anyone and I said no. I didn't give any details about the breakup, I just said I don't want to talk about it so the friend gets off the phone since I wasn't giving any details. I have no idea what's going on. Is this a set up? Why is he doing this? He then has the nerve to message me on Facebook to say "so and so said you wanted to speak with me?", I left the message on seen and I never replied back.

[R 99]

Oh, for ****'s sake!

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[NoName🙀]

This is so insane