Online love is just an "initial" stage of a long-distance relationship (i.e. relationship sustained by phones, letters & visits-once-awhile later).
Remeber it is soooooo very easy to fall in love with someone's "mind" (i.e. his thoughts and what is "purely" said and actions in those rare little situations when you two meet) than the real person in life (i.e. see him/her "carry thru" day-to-day things in life). Words and "conceptual" actions will lead to thoughts/images in your head (i.e screw your mind) VERY EASYLY with very little effort and consequence. But we are physical & materialistic creatures. A person is ONLY fully defined by day-to-day things. And in long run there is no way to survive any love just on mind. It hurts a lot to see the truth in such situation. So most people just trade the fancy & virtual happiness now and get hurt later
Success? Possible but very hard if not prohibitively risky (and expensive). How risky and expensive? Just try to imagine and come up with a working plan that you two will be together in one place and forever (i.e. a plan involving giving up/delaying some of very important things for one or both of you and and move on .... cost, future, family risk ... blah blah blah)
BTW, I am 99.999% convinced this "on-line" post will not have any effect on your life (again just your mind ) . Since you will not likely see the truth if you are currently in an online love.
But I am posting this just "for the record" for giving something back to the net