Hello everyone!

It’s been a while since I posted on here but here’s my story:

I was with my ex-boyfriend for 1 year and a half when he suddenly broke up with me via text – as if that wasn’t enough – a month afterwards, he had some things of mine which I needed back. When he saw me, he began shouting at me in the middle of a busy station and verbally attacked me leaving me in tears afterwards. I truly hadn’t done anything wrong.
Well, the next 4-5 months after that, I had the best time of my life, I was meeting new people, my confidence and self-esteem was only growing and I felt fantastic – during this period, we had no contact and I barely thought about him. Even when I would, it was a feeling of ‘I am so happy we are no longer together’.
Back in June – six months after the break-up text – he sent me an email expressing his regret over losing me – I never responded to this. A couple of days afterwards, he called me on no caller ID and I picked up. We ended up having a very long conversation which ended in a FaceTime and left me feeling confused. He was saying things that I was wishing he would have said six months prior and promised me he never wanted to lose me again. I fell for it and for this I am so disappointed in myself.
Fast forward to this past Sunday, we were meant to meet up and suddenly he lashed out at me saying I should make other plans and let him sleep as he was exhausted. I rightly told him that he can’t lash out at me like that, especially when I hadn’t done anything wrong. I then received an apology text, which reminded me of the past and how I used to let him walk all over me, so this time I took a stand and said he cannot ever treat me like that.
He has since replied saying I am very lucky to have a job and that he needs to fix his own life (we are both graduates and he is not working yet) and I should be understanding – I have been nothing but understanding to his situation. I replied back to him – a message that never got delivered, later finding out he has blocked my number and has been playing up on social media. I sent him a WhatsApp to say we need to talk (I want to have one final conversation as I want him out of my life). He has read this and has not replied.

I know I have been reckless in letting him back in, trust me I have never felt so disappointed in myself up until this moment. I am asking for no judgement here, but pure advice from you kind people who have helped me in the past.
I don’t want to make a mistake in letting him back in, but how do I break up with somebody when they won’t even talk to me? Shall I just give up?