It takes a huge amount of courage and intelligence to acknowledge /recognise the possibility that there can be realities and truths beyond one's own personal experiences.Afterrepreated betrayals it's natural to stay alone and focus on healing and recovery... but long term self-isolation as you say, is not healthy. We just have to develop a degree of discernment that rejects the vampires in human form, before we engage with them to the point of getting hurt. That truly takes a skill I am currently learning to develop!