(Friendship advice)My friend keeps calling me names. I don't know what to do. Please, I really need some advice.

So, my friend and I have been friends for over 8 years. We've been friends since kindergarten, and I'm 15 now, and he's 14. Everything went great from kindergarten to 6 grade, I mean, he did call me stuff here and there, but I always forgave him. In 7th grade, the old 6 graders (me) has to move to another school, to continue there. We continue 7th grade up until 9th grade. In 7th grade, he started telling me, my hair is too big, and he kept asking me if I ever brush it, (which I do). I didn't look much into it, as it was just...you know hair. I didn't care much in 7th grade. Later in the year, some of my new classmates (the boys only) started calling me by my front name, even tho they know I don't like it. (Using fake name: My name is Karen Clara Maria. I hate my first name, and I've always been called by my second name. I told everyone that, but the boys still kept picking on me.) I tried to ignore it, but it got worse. It ended up with me crying in my bed at night, which I've never done. What was even worse, was that my friend also started doing it. And he KNOWS I hate my first name.

He didn't do it the way the boys did, but when the teacher forgot, or hesitated when they had to call our names, he just started laughing, and told me, "Haha, he hesitated at your name!" I just fake smiled. Then it got to the point where he sometimes would start repeating another name or object that sounded very similar to my name, and then end it by saying my name two or three times. Then he would laugh it off. Enough about the name thing. At the end of 7th grade I started getting..pimples... and I mean, not a lot, but just some, which he ofc noticed. So while we're doing our work at school, we had to work in teams, and I got paired up with him and another boy. (The other boy was a very good friend.) In the middle of it all, he started pointing at one of pimples and said, "You got a lot of pimples, and one right there. Do you want to know how I know that?" I ignored him. (It might get disgusting) "Because it's yellow." (Sorry.) I was ashamed, because some of my classmates looked at me, and I was trying to hide behind my computer. Luckily my other friend told him that it is normal. In 8th grade he started calling me fat and ugly almost everyday. He would do it while laughing, and right after he would tell me a joke or something similar. The problem is, I always forgive him. I'm in 8th grade now, almost done with it, and he still continues with the name calling. It's getting hard, and I'm getting insecured about myself a lot. I can't even eat something sweet at school without him telling me I'm a pig. (In a fun voice..) I let the tears roll down at night in my bed, which I've never done. I've never told anyone about this, since I've always been seen as the happy girl, and I don't want people to look at me differently. But I feel like I can't take it anymore with the name calling.

What should I do?