Next time he says: "I can't go on without you", just say, looking straight in his eyes: "Yes, you can". It might be a tough pill to swallow, but it is the truth - he can. Eventually he will appreciate you for saying that to him, because it is the ultimate truth and the ultimate in empowerment. My first boyfriend said that to me, and I appreciate it. Nothing is more empowering - albeit bitter - than understanding that one can go on on one's own, without crutches.