Dear Ninja,
What do you do when your in love with an ex who is back with there ex and you cant let go of them?
Not Over It
Dear Not Over it,
You have to get over it.
Exes are exes FOR A REASON. If it didn't work the first time, there's a higher probability that you will fail the second. And there's nothing worse than looking back on the last few years and seen you've been nothing but a failure. Spend your energy instead on making YOURSELF happy, like with a hobby, or a stripper. Once your mind is clear of the infatuation, you will realize that the relationship wasn't really that great (because if it was, you'd still be with her), and more easily move on. Now don't go doing something stupid like woodworking and make a shrine of them. That's just stalker creepy.
If your lust is based on sex, trust me, she's not the only one with a vagina. Also, if this relationship never went to physical and was just an online fling, then unplug and go to a real bar, meet a real girl, and you know, do real people stuffs. You might find that a little more satisfying than camming with a chick who might be (probably is) also camming with 35 other dudes.
Good luck.