Long distance relationships...?

i really like this boy ive been talking to n we've been together almost 2 years(september 12) but he lives in Virgina... i really love him n i talk to him almost everyday n i know wat he looks like cas he texts me pictures and stuff n he wants me to marry him as well. i really like him and he says he wants to asks but he doesnt wanna rush me. i love him alot but im kinda scared on what to do? he was also talking about coming to my senior prom with me as well. please help...