Really insecure about my body...

So I'm 13 about to turn 14 in about 3 months. At the age of 5 months my parents put me in daycare because they worked full 8+ hour days. I knew a lot of these kids since I was really really young but as I got older they became more mean to me. At the young age of only 7 my "friends" started making fun of me for my weight (I'm quite skinny with not a lot of boobs, butt, or thick thighs, what guys look for in a girl these days) and my skin color (I'm quite pale). Ever since, I have been really insecure about what people thought/think of me because if my so called "friends" could say this to my face, what would people who aren't my friends say behind my back? Almost 7 years later I care a lot about my appearance and what people think when they see me. Another reason I hate how I look is I had a crush on this guy a few months back, you know how friends are, you tell them and they want to get you two together. So, my best friend asked him how he felt about me, tested out the waters. and he said that he would never date a skinny, white girl and it hurt me a lot. I think that I have a really good personality but a lot of people (guys mainly) can't see beneath what girls look like. Him saying this didn't help with my insecurities at all, actually making them worse. Any advice for me about how to love myself? I don't know what to do and this has always been a problem for me... any help ladies...?