About a year ago my sister started dating a guy who in my opinion had a few red flags. He was very intense, there seemed to be love bombing and things moved very quickly. After about 6 months she broke up with him because she wasn't ready for the kind of relationship he wanted. When they broke up, he took it really badly, and apparently had a bit of an emotional breakdown.
Since lockdown, she has been back in touch with him, initially just to see how he was doing, but now says she is considering dating him again once life returns to some kind of normal. She says he has had counselling which has helped identify why he was so intense, is on antidepressants, and seems in a better place now. But, I'm trying to warn her against this because I'm concerned that this will go wrong again and she will get hurt. If it were a few years down the line and he had had other successful relationships in between then it wouldn't worry me but at the moment, it all seems so raw and recent.
Has anyone been in a similar situation and got back together with someone after a short relationship which ended badly first time, but after which the other person tried to 'fix' themselves to make it work again? If so, did it work out the second time round?