As someone who has tended to find a lifestyle that leans toward the more hermit-like also tends to be a less stressful experience, I will say that the few individuals that I've come to regard as trustworthy, have at points, turned out to be very important to me - in that respect, the benefits from having let trust develop in those cases have outweighed the cost of experiencing the many that didn't make the cut.

I do agree with DP_2017's comment about dogs - you can't hide how you feel to a canine. They can often read us better than we can...