I kind of agree that your sobriety is the most important thing you have at this moment but hell to turn around and start doubting your whole relationship because she had a drunken night out with her friends stinks to me of the worst kind of self centred ********.
Oh you had to stay up a bit later than you wanted and listen to her snore, I hope you are cringing after you put her through that as many times as you probably did.
If you want to split with her , then say so, be honest.
Unless you are not telling us what is really going on you have no leg to stand on hun.
And the "we could have been doing something together" quote is sickening.
I am an addict, not the significant other of an addict, but this idea that once we stop drinking we can control either others drinking or their behaviour is nasty.