Be wary. The odds are she dumped him, there's always two sides to a story and you've heard hers? The saying goes "once a cheat always a cheat". Be wary.

I agree there is a big chance she dumped him. And he calls her a psycho to cover his ads in case she tells you she dumped him.
That said I do believe "some" man can change. But those man ate the ones who are showing true remorse for the pain they caused. They show how regretful they are and start to realise the pain they caused. They work on themselves by seeing a therapist to work on their issue because all cheaters have an issue with morals and boundaries and are selfish and immature. This can be worked on with therapy but without therapy he will just at some point fall back in the same cheating habits. So totally depends on ur situation. I'm giving my boyfriend a second chance but I do know the whole truth. he is truly remorsefull and i saw him hit his rock bottom. He is working hard on himself and us. I too do therapy cause it breaks everything to be cheated on. And he realizes its a long recovery it can take 2-3 years or mire to build trust again. They have to be an open book and don't have freedom anymore to go out with friends etc. If your ex thinks he can handle all that that sure he might change. If he thinks oh let's just get back together and act like nothing happened than no good luck to you.

He called the gal psycho? Be wary. He might be the psychopath who goes around ex and ex-ex acting like he is the victim.

I am very wary and my guard is definitely up. We are not acting as if nothing happened. We talk about it. But my guard is up

My ex acted like he was totally honest with me. He almost never lie i thought. I've since learnt (the hard way) that psychopaths use word salads, time salad and switch up the "actors" . Example, he told me she left him. Fact: he was the one who had left her. He told me he never had a gf after his marriage. Fact: he never had gf after his traditional tea ceremony, he was having multiple gfs since his solemnisation ceremony. He just mixed up the players and time so that he doesn't "lie" in his mind and so he never give any signs of lying. He was just "confused".

So I was and am in a similar situation. I am with a ma. Who was seeing me and two other women none of us knew about the other. Well me and the other lover/gf both only knew of the current gf and not about each other. Well me and the other girl found each other by accident suffice to say in the end it didn't end well for either of us gf's/lovers. He chose to let both of us go and called us both deplorable and deceptive psychos. Well 2 months later he was back sleeping with me and still is. He says he isn't and hasn't talked to the other ex but I know him and her are both lying I just try to put it out of my mind. Sometimes the guy does leave the situation when feeling threatened that his secret relationships may be found out. Sociopaths and narcissistic people tend to be this way. I'd be weary and keep an eye on him. It's hard to take them at their word. Exactly!!! Omg like the other person said in their comment just different players they just switch it up. Same script for every girl that was something me and the other girl both called him out on he wasn't happy about that. He still uses the same script even now. Like myself only you can decide if it's worth the effort and energy in the end.

The pain is excruciating. It always end worse and it will end for sure. This man is not trustworthy. Both of you are feeling one another to "be safe" and cheating yourselves that this time it will work. But he will win because he will make you miss him so much especially how good he is in bed.

My advice would be to go out there and casually date a couple of other people first. It doesn't have to be anything serious, even just some Tinder coffee meetups. Really see what your options are before getting back with someone who hasn't valued you in the past.

Plus - he will more than likely show his true colors during this time as well.

You can't help at times to be attracted to certain people, but I wouldn't call it love per say. There is likely a bit of damage inside of yourself regarding your self esteem and worth that allows him to weasel his way back into your life after his cheating relationship came to an end.

I think the issue is more of priority of what attracts you. Everyone would agree that they would want an attractive mate who is good in bed. However, if you put that above loyalty, honesty, and selflessness you are putting yourself on a path to pain again.

If you get into a relationship again, knowing very well that he has these significant character/moral issues, then you are walking eyes wide open into a predictable situation.

You have to do what your gut and heart are telling not you. I will definitely try one more time.
Put some clear new rules on the table. Things that can help you trust him.
Tell him that it is a big deal for you to take him back but that trust is really bad.
Negotiate things where you can meet in the middle that will help with regainign that trust.
I think you will know very quick if you are getting what you want. If things don't go the way you want them, it will feel good to be the one who calls it quits this time.