For a little backstory, my gf and I have been together for almost 4 years, living together for 3. We are both 20 with full time jobs but she doesn't have her drivers license yet. For a while now she's made a habit of going up to her grandmother's house in a city that is a little more than half an hour away to see her and her mom.  I have tried putting my self in her shoes but I just can't understand this. She says it's so she can practice driving but I know she only does that for a couple hours at most. There used to be a time where the normal weekend for me would be her mom picking her up from work on friday and then her staying the ENTIRE weekend until I have to pick her up monday night from work. It's taken a serious toll on me as we both work a lot so we don't get to spend a whole lot of time together during the weekdays. I told her how this makes me feel and she's stopped going for that long a while ago, but now this weekend she wants to leave to go to her 6 y.o cousin's bday party today (saturday) and then stay all the way thru sunday night and have me pick her up again on monday. I'm really trying not to be a controlling boyfriend and try to understand her POV but it is just infuriating to me that she always does this. We have a home. We have a place to live. You do not need to be going over there to spend the nights like you're an adult not a little kid. AITA?