Boundaries and Buddhism

Further to [this question](https://buddhism.stackexchange.com/q/33618/254) Do Buddhists adhere to the Western concept of “Boundaries” to protect oneself? Or is the creation of boundaries an obstacle to enlightenment because of its avoidance of future suffering? Are we called to give of ourselves without bounds, even to those without gratitude for our service? How does this apply to emotional, financial, and service to others with our time?