dog anxiety

i have 3 boston terriers and one really took up with my now ex live in girl now every time i go to leave she freaks out a bit fortunatly i work overnite and i am able to take 2 dogs to work but since girlfriend isnt around no3 wants to go to i say no problem but after a couple of hours my 1 pup starts getting nervous then starts puking matter of fact 3 times on the way home tonight and i left work early because i felt bad for her any suggestions nothing crude these dogs are my kids thanks