Fear of touching people!? HELP ME PLEASE!!!?

(im a girl)so its not like im afriad its kind of like when a friend comes up to me to give me a hug ill kinda back away and be like no or if if a friend puts thr arm around me ill shrug it off. not in a mean way at all.. like ina joking way ill do it, but idk why i do that i dont feel uncomfterable when ppl touch me like when i give someone a hug ( which is very rare) it makes me feel loved and good inside not uncomfterable at all so idk why im so tactile and all that, like everyone knows me as the girl tht doesnt touch anyone i mean not ina wierd way theyll make it a joke theyll be like ok everyone hug her now! like a joke.. but i dont know why im like this..