Confidence issues.

So I’m 14 and my confidence SUCKS. I have crooked teeth that sure are getting fixed with braces but idk.. and i have a lot of acne and everything about me is just eh. I went to school recently to test and normally I don’t let things get to me and I hold my head high and etc. but I know a kid who’s quite friendly/funny I was there for him when he was going through bullying and I helped him a couple times and last time I went in school to test he gave me a hug. But I think he was in a bad mood because he came up and me and my best friend were taking and he normally jokes around but i wasn’t in a very good mood I was tired and I felt insecure. So he came up and started saying that I look like I came out of the woods and I was looking for a boyfriend. I was wearing a hoodie and leggings but it kind of hurt. I feel like he meant it as a joke but it’s just my confidence is so low that those things bother me. I promise myself that I don’t let that bother me but I’m slowly loosing that promise any advice..?