First time posting on AIBU...here goes!
Will keep this brief. I’ve been dating a man for nearly three months now, he has been single for three years after a long term relationship ended.
He called me today while I was at work which is unusual for him and he told me he had just found out his ex has had a baby with her new partner and he is very upset. His exact words were: “I think I’m about to throw up.” He said he’d also called his mum as well to speak to her about it.
He said he thinks he would have taken the news much worse if he wasn’t dating me, as I’m a good distraction and we are getting on well 
He said he couldn’t bare to be single knowing his ex is loved up and now has a baby.
I’m just surprised he felt the need to share that with me. He also said he wanted to congratulate her but was worried that would open old wounds. He then shared a quote on social media saying: “It should have been me.” Cue lots of people responding to that saying WTF is this about?
There’s been a few other comments during the course of this very brief relationship about how she was always ‘the one’ and how he’s finally forgiven himself for letting her go.
This is madness, right? And I should walk away?