Is he my true friend?

I am 21 year old girl doing my postgraduation. I am staying at hostel. I have a boyfriend who is so friendly and approachable. Yesterday I was in my tight pants to college. After sitting the whole day wearing them the pants got wrinkled a lot at the crotch and region around pockets. Seeing this my friend told me it is so nice to see me in this pants and asked to pose for a photo with hands inside pockets. When I saw the photo I was humiliated because my pants appeared to be tied on my body and he is not deleting it. He asked me to allow him to put his hands inside my pants front pocket. I didnt allowed this. After that he is not talking to me. What should I do? Should I allow him, anyway I am going to the college today wearing the same stuff.