Why do some people sabotage their own interpersonal relationships?

Borderline: Chronic feelings of emptiness & guilt & despair with lack of trust in others, along with idealization/devaluation sense, make their relationships shaky & short-lasting as they fear rejection the closer they get to someone.

See below: We learn to relate from our caregivers, then the circle expands to friends, etc. Even if you see that something is not working in your relationship, you might try to fix the problem with the things that are available to you or you're most familiar with, leading to problems yet again. You might want to consider family/couples therapy to help you id the impeding issues and how to work through them.