I'm not going to ask about my gf's feelings when I was preoccupied with uni etc
Why are you choosing to not ask about her feelings?
Because I don't believe in caring about others.
You are in a relationship so you have an obligation to be sensitive to your partner's feelings. If you do not want to invest anything in the relationship, you should stop leading her on and end things.
Fuck it. I don't need any of that.
It's wrong to disregard how your girlfriend's feelings. If you aren't ready to be in a relationship you should be mature enough to state that to her in a respectful way.