I made food and actually, physically fed it to my friend. Also, I have stayed up late with my friend, till 5 am or later sometimes and this also concerns my girlfriend. The last time I stayed up with my friend she made a little pillow bed next to mine and stayed over. Nothing happened nor would it, yet this concerns my girlfriend too. She says it’s weird since my friend lives at the same apartment complex as me and could have gone to her place to sleep. In my mind, it’s not a big deal since there is nothing going on between my friend and me and it’s strictly friends hanging out. My girlfriend said all of these things, feeding my friend, staying up late with her, and her sleeping over are inappropriate. She hasn’t asked me to not hang out with my friend, but to just think about how I would feel if she were doing the same thing. I get it, just wanted another’s point of view. So thanks and I have not been having any late nights (or early mornings) with my friend since I do want to make my girlfriend happy.