AITHA for questioning my ex partner about his new romantically interest

So I (F20) had been with my ex partner (M21) for almost 11 months until we broke up because he didn’t consider himself mentally prepared anymore to continue putting effort and time into a commitment while trying to work on himself. We are extremely close I know everything about him and I’m not ever exaggerating it. We both lived with each other around the time we broke up as I had moved in with him due to issues with my mom and he told me he would love for me to stay with him until I figure out something different for the situation.

Anyway not the point. Due to this strong bond and connection even though we both disagreed at first to be romantically and sexually involved after we broke up - we both caved in after a week of our breakup and continued being romantically and sexually involved without the label which involved me staying over at his place , us going for drives, us cuddling and kissing and everything. What was very confusing was that stuff he didn’t do when we dated - he started doing them randomly for example he would never during dinner sit with me in bed or cuddle me during movies unless we were drinking. He started to spend more time with me even though we weren’t dating and he wasn’t obligated to.

Moving on, he did keep mentioning throughout a month after the breakup that he’s never going to have eyes for anyone nor will he ever be interested as he’s going to the ADF or will be working for the government which is why he’s advised to not be romantically involved with anyone (you guys may know the reason). Now I know a lot of guys say the same thing after they break up but he genuinely was the kind of guy to not give a shit about anyone in the world for example he had also recently lost two of his friends of 7 years due to some misunderstandings and he didn’t seem to gaf. So I did take him quite seriously about the whole ‘eyes for no one’ BIG mistake. He also did keep saying if time permits and if he’s worked on himself completely and if I’m still available he would like to take me out on a proper date and get back together. So I still had that little bit of hope.

However, recently this one girl who had ‘history’ with him in the past back in high school texted him and they caught up on Sunday which I was fine with ofcourse until he started randomly distancing himself from me. I mean he still considered me his ‘best friend’ so I’d expect the effort to spare even 5 mins to update me on his day/days. Eventually I found out he’s seeing her again within the span of a day as when I asked him if he wanted to catch up he mentioned he’s seeing her. I was really panicky and anxious about the whole detachment from his side so I crashed out and called him and told him how I feel and if he’s going to be dating her. He hung up on me as he didn’t want to continue talking on the phone about it so he texted me and in brief he told me he isn’t right now but if that’s what it comes down to he will be asking her out. It’s barely been two months since we broke up keep in mind and I know some people might think this is normal but I would’ve accepted it if he didn’t continue love bombing me romantically even after we broke up.

Along with this, he also ended up telling me that it’s best if we cut off all the sexual stuff between us however would still according to his words - he would still give me kisses and hugs and send flirty stuff only if I do. However this was before me finding out that he’s interested in her. I questioned him on what I did wrong for him to move on so quick and pick someone already but that’s a whole different convo. He did mention apparently he’s not moving on nor is he settling with someone yet.

Now AITAH for questioning him about this though according to his words we r now split so I don’t deserve the answers.