So I'v been playing Fallout 4 for almost a whole week and i have mostly have all companions but 3. My Fav is Curie and soon I Romanced with her but when I finally found Cait I told Curie to go to Sanctuary but never went back to the town. My heart was broken and I could not find her anywhere in town even with the bell so I had to reload a past save that was 5 hours back. I was so mad but glad i still had her. So I never could never get Cait yet but then again I went to Sanctuary to get Strong and told her to wait in the town and the second the game fully process the switch she sonic speeds out of the town to GOD KNOWS WHERE! So I reloaded again and tried to fallow her but can never keep up with her Flash like speed and when I get close to even talk she runs even faster! Has anyone else had this issue? And if so even know were the go? Please help!

When doing the main story line quest, I switch companions from Nick to some Brotherhood guy and asked Nick to go back to Sanctuary.

I finished the quest, the Brotherhood guy stayed on the airship and I went to Sanctuary looking for Nick...and he wasn't there.

I searched all over the place for him and I could not find him anywhere.

When I finally had given up and decided to move along with the main quest line, I had to visit Piper, and there I found Nick.

Send a Courser after her.

But for me Nick went to Sanctuary and stays there same for Piper. Also after Curie runs out I tried all the companions and they all stay in the city. Even moving them I had them go to the gas station and back and they fallow the order. Is it just her? Or when you romance one?

And I could never send a Courser after her she's in her synth body!