Guys guys guys!!
You're young, you're both employed (I think) and therefore paid, you have a significant other, and it's very easy to overthink situations like what you describe.
I will attempt to break it down:
1) College is super awesome and a time to behave dreadfully badly. You might learn a few things, scholastically and in the school of life.
2) Relationships are not simple, but I have found the following helpful:
a) B!tches be crazy.
b) You might have to listen to her stupid f*cking problems from time to time.
c) Laugh, kiss, hug.
3) Work makes you paid. Doing mad work can be a great destresser.
Sig Credit to Toxic