There are many different things that you can get your boyfriend for your two year anniversary. A really good gift is taking him out to eat or taking him to go see a movie. You can also purchase a video game that he really likes or a CD.
Make him something. Gifts from the heart are better than dinner! My hubby made me a box of coupons with cute things on them. They can be sexual or house chores or date related, whatever you can think up!