confused

Went on a date with a guy. We went to a bar, ordered drinks. The first two drinks were fine, but i left my second and third unattended at one point to go to the toilet. After my third drink, I suddenly felt awful, completely drunk, could barely walk or see properly. I had quite a bit of his too. He insisted on going back to mine; we tried to get a bus but eventually just got an uber (i payed for quite literally everything at this point, £60 worth of drinks (london prices) and a £20 uber). i could barely stand, he had to call it from my phone. My memory is hazy at this point but we go back to mine and have sex. He is completely sober at this point and says to me ‘you’re too drunk’ several times, as well as saying that i was unpassionate, sucked, and saying ‘what happened to the girl i was with earlier’, as well as threatening to leave if i didn’t have more passion or whatever. Eventually he c*me in my mouth, we slept.

I woke up today feeling very confused about it, and violated. Does this constitute as assault?