""yeah right, keep telling yourself that, no amount of pissing it up with friends, going out every weekend, sleeping with randomers will ever compare to a stable family life, good luck to you all.""
That reflects hatred.
It's as though the OP is accusing SP of choosing to have their relationship end, so they can party.
In my case, I was widowed. I didn't go out drinking when I was married, I had "Mummy" friends, similar to the OP ( but I wasn't judgy).
Then after my life was turned upside down, I made the best of it and went out straight after work, at the weekend. My children were settled in my Mums.
I had a really good time and don't regret any of it, including/especially the sex. Buying a bigger house etc couldn't of been part of my plans, as a single person, so I spent my share of our disposable income on drinking etc.
My children had a wonderful relationship with my Mum (who remained at home until she died, because we all cared for her).
My DDs are now adults and they, or our relationship haven't suffered for me not being sat at home.
None of my DDs will be Girlfriend/Mummy martyrs, they know their worth, whether in a relationship, or single.
I've been happily single for two years, but I'm going to start dating and going out, just before Christmas.
Technically, I'm no longer a LP, otherwise the OP would have my permission to judge me, so she's leaving someone who might give a shit, alone.