How do I keep my boyfriend interested in me?

The wording of this question is concerning because it implies that a boyfriend should lose interest, which in turn implies that the attraction was based on shallow qualities. My advice is to build the relationship from a deeper place. I am not discounting the value of physical attraction, because physical attraction is definitely an important part of the picture, I am merely telling you to make sure you are also bonded in other meaningful ways. For some people, their partner is the only person in the world who knows their story, think about how special that is and how unreplaceable you are to your partner. Another lasting bond would be working towards a common dream. As you two grew closer and learned of each other's dreams, the more you two integrate your efforts and direction, the stronger your bond will become.