Boyfriend

To me it seems like my boyfriend doesn't pay me any attention anymore. When he gets off work he will go straight to the shower and then lay on the couch all night. We used to have sex every day or every other day and now we barely have sex at all. Idk what to do. I've brought it up to him and he blows it off like it's just me being me. What can I do to bring that spark back into our relationship?