Loneliness is getting to me

I am a junior in high school and I know I am not that old and will grow up, but right now I am feeling quite lonely. I have friends and a really supportive family, but I really want a girlfriend and just someone to share physical affection with like not sex or anything near that, but like holding hands and just resting you body on someone and knowing they’re there and feeling their warmth. I go to an all boys school and it’s tough to meet girls and I have seen my friends in relationships and I just really want to experience some sort of affection because I’ve never had a girlfriend and feel really lonely right now.