So im 13 and I've had some really close family/friends since I was about 4 and we've always been super tight three boys and one girl 2 years younger then me

But today we were all just laying on one bed on our phones playing whatever and the oldest boy he's like 15 is laying kinda like right over my legs but his hand were he's playing his phone right next to/ above my vagina and I noticed his hand and fingers were like touching me in that area alot and I felt a little uncomfortable and this kept happening for 10 minutes not that noticeable so anyone else knew but enough that I could feel it and later on when I left when we all hugged and said goodbye he had his hand on my but so I was like nope and moved away quickly and I've been thinking about it all afternoon and night can someone give advice or something I don't know how to take this if it was an accident or on purpose and If so what to do 😓