Idk what to do ... my bf hasn’t been putting in effort

My bf that I’ve been dating for a year and four months has lately been putting less effort than what he use to he use to be so lovey dovey and tell me romantic things write me paragraphs and give me compliments now he doesn’t care what I do idk what to do anymore I feel like I’m always the one trying to solve out problems and he doesn’t seem to care also I am 17 years of age