No sex .. !

My husband is not asking for sex like he usually would... He doesn't even seem concerned that we're not having it and stuff .. I asked if he's streesed cuz of work.. N he says work's fine .. What else could it be ? Is he not intrested in me anymore? :( he used to ask me alot n tease me about having it & I would tease him n say no , but eventually would give in .. But that's not happening since 2 weeks! I'm sooo worried.. I don't wanna be that suspicious wife who's always desperate for attention n demanding time.. But it concerns me :(