Nobody. If I'm alone, I just let it out. If I'm in public, I hold it in until it passes or I can let it out in my car or a one-person bathroom.
I don't have trust issues as much as I have connection issues, mainly that I don't feel "connected" to anyone. It's something I never really thought about until discussing my relationship with my family to my therapist one day. Growing up, I noticed other kids would talk about their moms and dads and siblings, as if they not only enjoyed spending time with them, but they looked forward to it. When at the houses of other kids, their family interactions appeared so foreign to me.
I've have cared and do care about people, but I've only ever felt something approaching a bond with one person. I haven't spoken to her in over seven years, and I'm too afraid to speak to her the handful of times she's been in the area.
To clarify, there are people in my life I could "count on," but without a connection I find no solace in opening up to them. It's rather odd since I don't have what I would consider a connection with my therapist, but I still find her helpful. I suppose it's due to her position in my life as a device to echo, focus, or refine my thoughts, whereas my friends and family tend to only absorb my expressions of thought.