My girlfriend and I have been dating for 5 months, and so far it has been going very well. We have very different schedules but have learned to adapt to them, and see each other at least 2 or 3 times a week. Very little to complain about in general, our relationship feels very honest, caring, and loving. We’ve already been through a couple of big life events on both side but have been able to overcome them very well. However, this weekend we did get into our first real argument. My girlfriend has a habit of poking fun at or making fun of me in a teasing way, which I usually don’t mind. However, there’s been a couple of times in the past where it’s gone on for well over half an hour of constant teasing, where I told her it’s starting to make me feel sort of upset. They’re usually very small and not that big of a deal. This weekend though, we were on FaceTime, I was finishing up studying and she was working on some art. I asked her some mundane question, some type of “what if” I asked just to pass the time. She responded with “say please and I will”, which I thought was kind of weird, but went along with it and said please. She then said “no” and kept doing her thing. I gave it a couple of minutes and was just up front with her saying I thought it was rude how she kind of answered the question. She got upset too, saying that stuff like this has happened before, and we talked about it. After sleeping it off, I thought we were both over it and ready to move on. Last night though she brought it up again and asked exactly what I asked and how she responded, and said that she didn’t mean it in a rude way, and that we just went 2 different ways with how it was said, which I agree. She went to work this morning and I had an exam, so we couldn’t really talk in the morning like we usually do, but I just feel upset about the whole thing, and that it was just sort of blown out of proportion. What can I do to alleviate the situation and just go about handling the argument in a mature way?

Tl,dr: girlfriend and I got into an argument over what I considered was a rude comment she said. Looking for ways to alleviate the situation