For those who need the relief from everyday life, it's no different than taking a vacation. It's relaxing and enjoyable to change up the routine. So a lot of dominant personalities find themselves longing for submission in their private lives.

Nothing wrong with that.

Another question. I am currently in a relationship that is developing, we have not yet been intimate beyond what can be accomplished over the internet. He seems willing to test the waters of this with me, but I have concerns. I'm worried that, because He is not Dom by nature that He will never truly be able to fulfill that role the way I so need him to.
I will say that if you desire to give yourself to a dominant, then anything less will leave you feeling unfulfilled. If your potential partner isn't interested in the lifestyle... or worse, isn't even a particularly dominant personality, you will always yearn for more and will ultimately be unhappy. (Unless you can establish an open relationship that will allow you to further explore your submissive nature.)