question about email

[angel with wings]

I have this friend in whom I like to email as a form of communication. this person is always busy and doesn't seem to have much personal time. so emailing seems a good way to talk. but here lies the problem. this friend refuses to answer any email I send. I say to myself, then why send an email to someone who obviously doesn't want one? im only talking to myself.
so can you help me figure out a way to stop myself from emailing them? for some reason im addicted to writing to them, mostly because I know they read it. they just don't answer it. this frustration is a problem for me. I tell myself to stop, but I cant. any suggestions?

I have tried posting a note on my compute reminding me not to email them. then I do. iv tried to reward myself for not doing it, then I fail.
this is not a problem to them. they are not upset I write. they just wont answer. im the one left frustrated and hanging, hoping this time i'll get an answer. its torturous for us. we know we need to stop.
so any suggestions????