Just found out my ex has been lying for weeks

So my ex and I split 2 weeks ago. We were rocky for a little while, made even worse by a surprise and unwanted pregnancy and finally called it quits the day after his birthday.

I was extremely isolated while I was pregnant as I have little family and the friends I do have are scattered about and not local, and he was quite difficult to talk to and just generally what you expect of an avoidant partner and what I’m realising was just an uncaring person. Despite this I had hope he would change and we could work things out.

When I did eventually decide I wanted to abort the pregnancy (I do not want personal opinions on this choice), he told me he would be there for me and see it through with me. Foolishly, I believed him and allowed him to take me to the clinic where I had a horrific experience (extreme pain and vomiting to the point I had to be wheeled into my procedure early) and he did everything he was supposed to at the time and I had renewed hope that at the very least he would stick to his word about support but of course I was wrong. I spent a few hours with him afterwards at his place and he kissed me, which afterwards really upset me and I intended on speaking with him about it the next time he was free.

I never got the chance, as he completely blew me off yesterday which I found out was because he met with his ex. I begged him to just tell me if he was as emotionally I was wrecked but got no reply until I text the girl and asked her myself. He called to ask ‘who saw him’ and I asked him if he’d seen nothing wrong with what he’d done to which he said ‘it’s not a simple yes or no question’ and then said he’d call me today to talk as he had to go to bed for work.

Afterwards, I spoke to the ex (were familiar as we were friends back when he was teens when they were together) and found out a lot of things he’d said, like the fact apparently we broke up two months ago, I was toxic and emotionally and financially abusive (to clarify this man lived in my house rent free for the better part of 3 years and has bought nothing other than pouches of tobacco and takeout).

The man I loved does not exist, and right now I feel nothing for him whatsoever, but I know myself, and I know this feeling will go away and I will be absolutely devastated and lost as the last 7 years of my life have been spent orbiting this man.

How do I move past this? How do I let go of the man I thought I’d spend my life with? How do I move past the betrayal?