My bestfriend touched me in movie theatre and I let him

I live in a rented room alone for studies and currently in a ldr with my boyfriend from my home town. I have made many friends here from the coaching I used to take for bank exams. One boy here, became my friend and we have been friends for seven months now. Recently I saw a change in his behaviour and he tried to touch me...

This was when my best friend and I went to watch spiderman together last Friday. We booked the last available front row seats as they were only available at that time. During the first 30 minutes we both were laughing and giggling and enjoying the movie, then he moved closer and rested his right arm over my shoulder, I didn't shrug him off as I thought he was just being friendly. We continued to watch the movie for some time until suddenly I realised that his hand moved down to my chest from my shoulder and he was resting it there.. i was uncomfortable for a moment, but I still didn't call him out.. I was getting goosebumps as his hand was putting more and more pressure on my chest. He wasn't unaware of that either... He then slowly started to move his fingers around my nipple and I got so aroused that I forgot that he's my best friend and not my boyfriend.. and I casually leaned back into my chair to give him more access. This Continued for like 15-20 minutes and now he was confidently grabbing and pressing my right boob like he owns it... He also tried to slide his hand under my bra through the neck but my bra was tight so he couldn't do that. We both were avoiding eye contact as that would be super awkward... And we finished the movie and went home awkwardly. I haven't spoken with him since.