I'm on the same boat as you, I ****ed up my last "relationship" because of the plate spinning and being too aloof/uncommitted. Are you currently seeing someone who you think has LTR potential?
My advice would be to narrow your focus, I am assuming you want a LTR. Screen hard on the first 2-3 dates until you feel confident that she meets your standards before you commit your time and energy to her. From your posts I can tell you have very good screening skills, so trust them. If things don't work out you can always break up and go find a new chick. But I feel for you, I just went on a 1st date with a woman who passed all my initial screening with flying colors and now that im not plate spinning im scared AF, it feels weird but I will man up and ignore that weird feeling. Kinda feels like being a kid and the first time biking without training wheels.
BTW what was it about spinning plates that messed up your last relationship?