No! You should just email him that it's over. It's obvious that he is not putting in the effort needed to maintain and nurture a long distance relationship. (I think I mentioned that in your other thread) If he's not putting in any effort then Don't try to manipulate or guilt him into wanting you. It should come naturally to him and if it's not then you're simply an option to him.
If you want to sent him a fairwell email then just say something along the lines of: "Thank you for the sweet time we did manage to spend together. I love you but It's apparent that we're unable to keep things going so it's best we end things so that we both can be open and free to meet others that are close enough to nuture and maintain a relationship with. " (something to that effect) Do not send that unless you mean it. It's not meant to be a strategy to get him back.
Keep in mind that you've not been happy with his lack of care with you and your "relationship." I'm sorry but the truth is ~ If he cared, he'd show you.
I'm pretty sure that if you liked me alot then you would find time to talk to me more than you do,
This line is the crux of the matter. If you want him to contact you more then ask him to outright. If after your discussion things don't change then your gut feeling is totally correct.
Be good to yourself and don't be hanging around hoping.. get right down to it and ask for what you want and if he doesn't give it then move on from him so you can heal and find someone close enough to love you the way you want to be loved.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion