Re: Girl acts disrespectful
Its not exactly rash. You probably have more history you're hiding but its probably not important to share unless you're missing key behavioral points on yourside as well as hers. Like what do you do to upset her besides forgetting milk? What does she do that upsets you outside of just picking small fights?
If shes no longer worth the trouble then an exit might be a positive change. But remember once you decide to commit to this idea she'll notice. Which could be good or bad depending on how you handle it along with matching your goals for following through.
For now if you haven't commited to leaving her try freezing her out to correct her behavior. This is a rare case i believe that freezing out is actually appropreate. Give her a couple days to a week of silence allowing tension to build. I believe signs in which to break early from the freeze out should be if she rely wants to talk to you and not just call you out for a fight.
If you do confront her, i'd leave out as much of the emotional side on your part as possible and consider responding to her with active listening. I'd also throw in a bit of complaints but i wouldnt make it about complaining about what relationship problems you both have. Instead i'd make it an active coversation about how you both are working towards the same goal but its obvious that there's been too much of the emotional stress tension thats been built.
In my personal opinion it sounds like you two are living together. If so you guys have spent too much time together and ares tarting to get on each others nerves. See about trying to develop pacing in the relationship if so. Maybe dont see each other every other day or every few days. Still text or call but maye too much physical space is getti g to you guys....
Every moment counts, get out of your head and enjoy it.