Let ol' DL break it down for ya:
Well unless you're a glutton for punishment. Online dating websites are 90% male and the attention goes straight to those bitches' heads. They've got the pick of the crop and unless you're some swag wear'n yolo sack of crap then forget it, bub. Not to mention most of em are fatties.
But outside of dating websites I'd say an internet relationship is still a bad idea. Just look at the jokers on NG who all criceljerk each other's blogs and are in a new e-relationship every month. They do it for attention and keep getting it through creating some kind of gay/bi/pansexual/brony/furry persona to feel special. You know the NG users I'm talk'n about.
An internet relationship isn't even real. It's easy to act as your ideal self online and likewise to be swindles by someone else's. This is why so many of these internet relationships fizzle out - people realize the person they thought was cool and insightful is some aspie retard who's mind might as well be from gum drop lane. It's pure fantasy for the most part. Sometimes they work out but it's rare and no you don't have a legit one.