Me(21F) and my 2 other friends(both 21F) were studying and after awhile they were laughing and giggling so loud, I just shrugged it off although it seems like they were purposely excluding me out of the context. I found out later that they were laughing a picture of a child which they say I look like, I was not okay after it because she doesn’t even look like me even when I was a child. How should I respond when it offended me and appears like they are poking fun at my appearance?