Criticizing yourself is one thing; hearing criticism from someone else is totally different. This is pretty much true for any trait you could name. Like, I might think my nose looks ugly. I might even contemplate surgery. That's my business. Doesn't mean I'm happy to hear a friend TELL me that my nose looks ugly and that I should get surgery. Fuck that; I want the people around me to appreciate and admire me just the way I am. I want to be friends with people who see the things I think are flaws and find them endearing and loveable and maybe even beautiful. And to be honest... I think that's a totally reasonable and healthy way to be. It's okay to want approval from others. Basically I think your emotion here makes perfect sense and is entirely healthy and normal. Good for you.