I can definately relate to being ready to end therapy because a few email when unreplied. Just make sure you consider all possible reasons for why you might not respond. I would also look closely at your email. When I had my falling out with my T, I thought that I had been clear about what was going on in my head and how much I needed a response. Turns out I was really clear at all. In my case after I cooled down a bit, I decided that I owed it to myself to face my T, tell her what I thought about her misleading me about actually caring, and end therapy the right way (in my mind). This was a very hard thing to do. But I was soooo glad that I scheduled and went to that appointment. My T and I worked through the misunderstanding.

All I am saying is allow yourself room to change your mind.