Same, they are just kidding. Just laugh it off. I always told my friend he would be laughing if I called him names, but I was wrong. I found a really embarrassing photo of him and showed it to all my friends, but he just laughed at it. It still ****** me off, but I try to keep a positive mindset.
Time to dump these so called friends. You need to make a choice of being temporarily without friends while waiting to make new ones or tolerating these and causing harm to your self esteem.
Then don't worry about it