I liked going with someone, we only worked out once together every 6 days or so as they spotted me, but we still WENT together and it was motivating. We were room mates so that helped scheduling, and we were both single at the time.
So yes in an ideal world I like going with someone when you are on the same page, or maybe you don't train directly together like we didn't. Staying on the boards, watching a BB video from time to time and keeping in touch with workout buddies helps keep me not just going, but not wasting time in the gym, and keeping my diet somewhat on track. My wife doesn't understand the video aspect but I like it for motivation, Branch Warren doesn't have a long vocabulary beyond "light weight motherfucker" but I still like to see him beat himself up, it reminds me to do the same instead of just showing up.
Loud violent music in my ears also helps keep me awake, gotta have that.