In my view it is very emotive still, there are a lot of things that could potentially trigger guilt. You are also listing what you view what you see as options, which may be very different to what he has in mind.
What are the main pieces of information that you want to get across? Maybe start by listing those and then work the email around those. In my view they are not clear from the email. Is it an email letting him know the dates of return or is it a relationship talk?
Personally as he kind of said when you left Dublin that you were crowding him (?) I would keep this briefer and stick to neutral subjects. If you would like me to do an edit I would be happy to, list the main points you want to make.
