My b/f used 2 look @ me like i was so beautiful but now even if i dress up he barely notices. HELP!?

my b/f and i have been datin for 2 yrs and he seems bored w/ me. i've tried dressing up in y outfits for him and talking to him about it but nothing has changed. i love him alot! i just want feel pretty or special for him but i don't know how.