I'm selective whom I trust; I have very few friends and with them I have boundaries beyond which trusting is very iffy. Oddly, three people whom I feel comfortable being very vulnerable with and whom I completely trust to never do anything that might hurt my well-being, aren't actually friends in the way of sharing a social network. One was a paid in-home helper while my 94 yr old mother was in decline, one is a church spiritual advisor who helped keep me sane while the same mother declined for 3 years and one is a fellow member of a volunteer service organization. They're probably all surrogate older sisters.....something I never had.