yes sometimes people break up & after being single realise what they were missing. But it sounds like he does intend to move on.
I will say, especially for someone grieving the end of their reproductive journey it is a more than a little arrogant to think you can just “explain” to someone parenthood isn’t just having a biological child. I am childfree & can respect that for most people the desire to have a biological child is very real. You can’t just expect someone to not feel those desires just because you have explained away their feelings & minimised them.
It sounds like you were desperate to fit this square peg into a round hole & make him want to take on your children as a step parent & be happy with that.
He seemingly had a separate life which did involve drugs away from you - so it is unrealistic to expect you could have moved in & this would not have become an issue at some point. His values don’t align with yours.
I wouldn’t invest too much time into hoping he will “see the error of his ways” and realise what he had with you - he knows what he had & decided it was not for him anymore. It’s wise to respect people’s decisions when they break up & not try to undermine them by believing you know them better than they know themselves.
I’m not sure why he is coming around to console you - this needs to stop, you are addicted to him like a drug & you need to get him out of your system.
Keeping a journal is good for getting your thoughts out & baths are just the best aren’t they! Closest I get to meditation, so you’re onto a winner there. When the world feels too much a nice soak can be so comforting.
People generally aren’t there when you have a breakup, because nobody can actually say anything to make you feel better. It really is self healing & time. People do generally get a bit put out when someone who is heartbroken is laying all their grief onto them, or dominating a conversation about their heartbreak. It is helpful to put into perspective that most of us at some stage do carry around a grief.
I don’t have many friends either & for me if I am sad don’t like to burden people with that, I prefer my friends & family to be themselves & take my mind off heartbreak. Not help heal it - because in reality nobody can do that.
Also consider your friends & family may feel this guys wasn’t actually all that great - it’s a lot harder to be sympathetic to someone & console them when privately you feel that person is not worth the heartache & that you are ultimately better off.
I think this is a lesson for everyone with kids to not allow your children to become emotionally entangled with the people you date - why is your son calling him, you didn’t even live together! I would not encourage boyfriends & kids to be so close as it puts them in an emotionally vulnerable spot when you break up. Dealing with feeling guilty at your kids disappointment is a hard but worthwhile learning curve.
It sounds like you were desperate to give him this instant family & make him see that he doesn’t need kids, here is your ready made family! It is naive to expect people will not want biological children & as unfair as it is, a lot of men say they don’t want them then change their minds once their mates start to settle down.
As a childfree person I have only met a handful of men who truly are childfree. On Tinder most men in my age bracket seem to be single dads or want a family. You will have better luck dating someone who is a single dad than convincing someone they don’t want kids.