Got it - that is an amazing rule for me to use. I'll keep in mind to reserve and spend holidays with my partner (unless agrees otherwise) and periodically discuss limits. We actually communicate quite a lot, which I think is a strong point of our relationship; while we aren't perfect here, I'm pretty proud of our communication rules.
I think the reasons I left is because the party was a bit stressful to me, I wanted a small break from my gf (already prior in the day I was at hers to fix my phone) and I wanted to get groceries. I'm not sure how to communicate appropriately to my gf that I might need a break from her though.