Yesterday, two people apologised to me, separately, for using up my energy. My energy is my responsibility - I choose how to spend it. Sometimes I HAVE to do things that take me beyond my limits. It's not their fault that I crash from spending time with them. Why do people seem to take responsibility for me spending my energy with them? When I'm out of energy and I have to end a conversation, I say that I need to stop. Normally, I catch myself not being able to string a sentence together, say 'I'm at the end of my energy', and I'd better end the conversation/take a break. Is there a better way to say this, in a way to prevent people from feeling guilty?