What To Get Boyfriend For 18 Birthday?

Your budget is a factor here. You can get him a nice bracelet or necklace.  Something that he will remember you for.  Depending where you live sometimes at a Pawn shop you can get nice things that are new not used. I have some friends who are pawn shop owners and they have new things that are very reasonable.  You could go out on the limb and if money isn't an object try a helicopter ride. A moment in time to remember.

Will he be going off to college soon?  If so, ask his parents what he might need for his dorm room and if he is...something the suggest and a picture taken of the 2 of you together might be good.  Does he have a particular sport that he enjoys?  How about 2 tickets to that sporting event (then he can ask you to go with him)...possibly you could find a poster or picture of his favorite player??  If he plays sports and you know the number on his jersey you could buy a pendant using that number or get a pendant and have the number engraved on it.  If he owns a car, buy him a car care kit...soap, chamois, car wax, a bucket & brush and/or car vacuum , you get the idea.  Whatever you decide on, I am sure he will appreciate it.  You don't have to spend a lot of money.  Sometimes a nice card and a letter telling him how nice your life has been since you met him would mean as much as any high dollar gift.  Wish him a happy birthday from all of us here on Blurtit.