wondering if ive been violated?

Hi guys, I am unsure if this is the right place to post and I apologise for formatting since im on mobile

So I live in Lisbon, Portugal. And my friends and I had an event last week where we had a blast.

After the event my friends wanted to go to a club. Me and my boyfriend didn't want to go at first, but he was mentioning it might be fun. I didn't want to but I ended up going with.

I feel like I was groped twice.

So the club was busy and we were in the middle of it. I felt someone grab my butt but i thought it was busy and it happens! But then it happened again.. same guy, nails and all, in my butt.

I freaked out and wanted to leave. I tried to tell my boyfriend/friends but it was loud and they couldn't understand me well. I signalled i wanted to leave and wanted to go. My boyfriend and best friend followed

Outside i told them the situation and they comforted me, and helped me get home safely. But now I have some friends in the group saying I was overreacting and ruined their vibe..

My main question is was I thinking wrong? Was it really an accident? Ill apologise if it was but I feel violated and they make me seem like I was in the wrong and I am unsure how to deal with this.. can I have some advice?