Well my first year was spent with lance passing out. :/ but my second year was the 24th of this month, since we couldnt spend it together, we celebrated it on the 25th when we could be together. I got a whole bunch of red and white tea lights put them on candle plates. Then i got this huge 3ft tall champagne glass, glued paper mache hearts around the glass, and filled it with red, white,pink and dark pink rose petals, then i made a checkered design with purple and silver hershey kisses on this white fur carpet i have ( dark kisses representing the bad memories and silver kisses representing the good memories), then i sprinkled rose petals all over my floor and all over my bed. I burnt a cd of me and lances songs. Played that. But before that i made him dinner, and while he was relaxing on the couch i went upstairs and did it all. that way he walked in to my room, and it was candlelite and his favorite song that reminds him of me was playing. Then we spent the night together, doing whatever came to mind. Most of it was just us being naked(we both feel really close when we are like that) and just telling each other how much we mean, and then eventually turned sexual. But if your guy isnt like mine, and really into the romantic, i dont know what to tell you.
Why dont you try making something about the memories you guys had? Like a scrap book type of thing, or after dinner take him, and give him a massage while his favorite songs(if he has any) that remind you guys of each other play. I dont know it really depends on what type of guy he is. If hes more romantic or what?
Edit: congrats on your one year!
) and taking me out for dinner 
Congrats on the 1 Year!