Last night going to bed after closing my eyes my girlfriend said she wanted to show me a photo on her phone. I said I was too tired and I just wanted to sleep and would look at it in the morning. She got out of bed and said I had really offended and hurt her by not looking at the photo as she told me she was going to look for it to show me (I missed her saying this as I was tired). She then raised her voice which I asked her to lower, left the room and came back and asked was I going to apologise, I asked did she not think she was overreacting to which she replied that I was gaslighting her and invalidating her feelings by saying that. Is that gaslighting?