Is it possible to just know ?

i have known my current boyfriend for a long time. we went to high school together but we never dated until now. we started dating a few days after graduation.its crazy how fast you can fall for someone. the funny thing is he was always there i just didn't know it .i know i am still young but i have never felt this way about anyone its indescribable. i could actually see my self marring him someday and its crazy to say that because its all so fast but we are seriously perfect for each other and we talk about forever and mean it he is as in love with me as i am in love with him but do things like this happen and actually work out i mean it all seams so crazy but i think i just know it will but i want to hear about stories like ours