KBoogi is right. Even just the feeling itself is complicated, but ehh, not to stray off subject..
I daresay there is actual love on Shinobilegends. True, some (or perhaps even most) consider it merely roleplaying and keep actual feelings separated from it, or then they might not bother with even that much, instead just marry either for having a spouse to brag with or the buff it gives, if not both. Not everyone however is like that. Some atleast try to get to know the one they engage in romantic roleplaying with, perhaps forge a friendship, perhaps gain just an occasional talk-buddy or perhaps even a life-long close friend.
Many perhaps', but bear with me, my rant is almost over..^_^;
And finally there are those few who actually grow quite fond of the other, perhaps develop a level of trust and closeness beyond usual friendship because of attraction strong enough. Now I'm not saying it inevitably means those two fall for eachother, afterall, can't one care for and love someone as a friend? But either way, its possible for the two involved to become a real couple aswell, but for it to actually work commitment and effort is needed in ample supply, even though that probably was needless to say..0.o
But yeah, thats just my opinion. Feel free to disagree if you wish.