I do not think Dilmer will last.

1. They have hectic schedules

This NYE Demz is hosting the MTV show and Wilmer is off celebrating in vegas with her ex- Joe Jonas. He could have either decided to run off with his buddies or he was paid to be there. Which is likely. One of the things that caused the Russel Brand - Katy Perry divorce was the fast their careers gave them little time together. He's a comic shes a singer, both live lives on the road.

This relationship might just fizzle out.

2. He has a reputation

I am reading rumors that he was seen making out with some woman at his recent NYE party. I will not be suprised if TMZ or some other website gets a cellphone cam shot of him in the act.

WV also seems to be a party boy, this tweets mentions his "Wolfpack" after Tiffany's wedding where He was supposed to be Demi's date, she goes home to prep for her tour and he is off to a Memphis TV bbq place.

Or he might do something D-bagged like, lets say Demi ahs a family crisis similar to what Selena had when her mom miscarried. Justin was right there to support her. What if instead WV decides to run off instead and party with his buddies?

3. Demi's recovery - She may have won some battles but her war is far from over. If this relationship might effect that her parents and team will probably step in.

If this relationship ends it is better that it sputters out that explodes. Wilmer has become good friends with Demi's friends and her former So Random cast. If he is caught cheating, He will be in a nasty situation with them, who will back Demi way before they defend him. I also fear that Demi is one bad event away from having this mentally unravel for her. bad break up or even some family emergency.

Dmei is also getting close to members of his family, she is following Marylin on twitter and WV even mentioned introducing Maddie to his little bro Christian.
A bad break up can be really nasty for her if things are getting this heated.