Not sure why I feel so bitter to my boyfriend going into rehab?

I feel like when the going gets tough, he always seems to have a way to bail out and leave us. Then comes back from jail as if nothing happened. Now his PO is requesting he go to a rehab for a few months because he was honest with him about using drugs last week, and the reason he used drugs is because we got into a fight, and I wouldn't let him back in and so he had no where to go and no family here so he used drugs to be able to get into a detox center. Two days before check in I ask him to come back because I'm stressed out and need 5 mins away from my kids to think for myself. I feel so stressed out when raising kids alone and I have a lot less patience than I had 15 years ago and now I'm starting over with our 1 year old and I'm just out of patience and I held him so much up to this point that he now does not let me set him down and so my partner and I would take turns with him or else nothing would get done.

How to break a baby of clingy behavior?

Am I being selfish telling him I might not be here when he gets out?

I'm tired of doing this on my own and I know plenty of guys who would support us and love us not walk out on us. I feel he is being selfish and then to top it off he mentions he will get housing and have his own place through rehab, So to me why should I wait around for a guy who will be living separate from me? how will we raise a child together, if living separately? Just doesn't feel like it would be the same and it will only create more distance. I am Lost, hurt, broken hearted and just don't know how to feel because he has no choice but I don't have no energy and patience left to do this on my own and I'm mentally breaking. Like where's the alternative options or house arrest or something so he can still help with his child and not just walk out hoping everything will be the same in 8 months
Not sure why I feel so bitter to my boyfriend going into rehab?
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