Jenny -- I heard what might be a key for you in what you yourself wrote. You mentioned consistency. From my experience, trust isn't something I can create directly. Some people say trust is earned, but that's still a bit abstract for me. In a practical way, trust is developed as a by-product of consistency. For me, trust might reside as a goal or value at 30,000 feet or higher. At 10,000 feet I could have a project of becoming consistent with weekly reviews. At runway, my next weekly review is scheduled in my calendar. Each time I do one of those runway actions I build trust.
Some people might say I'm off by 10,000 feet one way or the other in those examples. But I hope the idea comes across. Best of luck in your implementation of GTD.