There is one person I'm trying to reach but all it says under the alias is "See my post "  
How do you private message an alias? Is it VIP status? Can we not pm an alias now?  
Thanks so much for your responses, I think lol
XOXO  
TL  

Click on the blue SUBJECT LINE of the alias-authored post. That makes it the TOP post on the reloaded page. Now click on the greyed out alias. Up pops a message window, pre-filled with the alias.
.
Or, from your Message center, "Compose" a new message. Cut and paste (or manually type in) the alias.

Go into Flat mode (upper right corner of the page has Tree or Flat.)