Don't like it here

My BF & I has been together for 2 yrs. We have been living together for 5 month. We've had disagreement b4 but this 1 was big. Since then we have been trying 2 get pass it but things are different. Its hard 2 talk because our work schedule changed & we're both tired at night. My attraction 4 him is slowly going away. Don't know what 2 do. Haven't been in this situation b4.