Hi Brady,
i am 31 and i still never went past a single date. when i was in high school and surrounded by North American students. i used to feel horrible and really embarrassed and i used to make all kinds of excuses so that my class mates will accept me and not make fun of me. when i went to university, where students came from all over the world. i found out that, outside north america and europe, not ever having a relationship when you are in your teens and even early twenties is no big deal.
i hope you that you be happy whether it is in a relationship or outside a relationship.
i didnt write this post to offer any help. i just wanted to tell you that i too felt really ashamed when i was in my teens about never having been in a relationship.