How can i stop being so insecure!!! please help!!!?

im a 15 year old girl and im going on vacation soon i have no friends so i hope i can try to meet people this year o my vaycay and take pics i isolate myself from people because i think im ugly i deleted my fb because i had no pics up everytime i take a pic i want to burn it ..i really just dont like my face...im pale white i have round face big round hazel dark eyes freckles and my face gets beet red so easily i feel so ugly any help on making me feel better please!! this has been going on for like 5 years now and im starting to go to therapy..i want to enjoy myself and takes lots of nice pics but ill just hate them i need a postive attitude about myself i need to think im pretty i just hate my face...