Living together can be hard. You get to see exactly how the person is. Have you explained how you feel to you boyfriend? Maybe just flat out telling him that you feel disrespected when he creates a huge mess and you are stuck with it. Instead of asking him to pick up the stuff or cleaning it up, just tell him how you feel when you have to do it. May be that will work. It may seem like he is not listening or he may even become annoyed but might hear what you are saying.

My boyfriend and I have had similar problems. I tried asking him liked you have and got no where. It wasn't until I said something like "I really feel disrespected when you..." I some times add "I am sorry if if this upsets you, but I have been feeling really upset myself and I needed to let you know." Some times that works enough for him to listen to me. HOWEVER, people do not always change. But, making him more aware of your feelings may help.