New and looking for an SOS

Im 19 years old and kinda consider myself one of the purest teenagers I know but not by choice lol. jike seriously i know 5th graders with more experience. Never been kissed...i know its a sounds a lil pathetic but that just how things lined up i guess.. And its Just like i havent ever had the chance for a realationship. Im knida shy so maybe thats the problem..But like what i need help understanding is like i have had crushes with guys but at the same time i can have the same feelings with girls. Even though i havent been with a guy or a girl can i still be bi? I want to tell my friends that i think im bi but then other times when i start the conversation they always think im kidding and just jumping to conculsions bc i havent had a boyfriend yet.

So i decided to turn to the website which makes me happy with my favorite past times...so if anybodys out there i would apperciate your input.