red flags?

Ok so yesterday i was really drunk but me and my SO was with my family drinking and i remember him keeping saying why do you keep disappearing (i was going for a wee i go frequently when i drink) Anyways i also remember him putting his arm around me and pinching me really really hard when no one was looking it really hurt :/ I’ve been with him over a year.... But there was something really weird about him pinching me like that...

When i asked him about it today...

i said why did you pinch me like that last night

he said i don’t know i just did :S but he couldn’t look me in my face

i don’t know i just got a really uneasy feeling about it

i was drunk so i’m trying to figure out in my head if it was malicious or playful