That's my case now! I have a distant relationship and for now it works great. Of course, I prefer to call her and hear her voice, even for a couple of minutes during the day, if we have the chance! Writing messages is not a good choice. Of course sometimes we write each other, but that's pretty normal. Definitely every week I dream abut the days off work.
Of course sometimes it's hard to be alone, when we are set apart, but this really makes things even greater when we see each other. Travelling about 200 kilometers every week (every direction) is not very easy too, but passion makes it seem like a child's play!
Of course, you have to trust each other a lot, because if you are not trustful, the things will not be very "pink"and flawless.