Am I in the wrong 💔

So 2 nights ago my partner and I went to his best friends house of many years to spend the night there.

While him and his mates were getting drunk my the minute while we were at the neighbours house because he had a pool table and all that stuff since it’s corona times. This bloke we will call him Jimmy was giving me looks and me just being curious just shrugged it off but more and more into the night he would rub against me. With the first time thinking it was an accident. He did that a few more times and I just kept shrugging it off because he was drunk and I didn’t want to be someone rude because I just met jimmy.

As I was playing a game of pool jimmy comes around the back of me and grabs my ass in front of everyone including my partner watching every move.

My partner then threw down everything he had and stormed and and I was just left there.

Am I in the wrong for ignoring jimmy giving looks and touching me or should I have done something.