Yes, we are responsible for whatever comes into our reality. By the law of attraction, we can only attract that with which we share resonance.
This question of responsibility is very complex, however, as we are all connected at different levels of consciousness.
I don't believe one has to understand all these levels of interconnectedness yet.
Suffice it that when we notice something we would rather not notice, we can change our energy by sending love to someone or to that situation, or we can allow the feelings to rise within us but simply observe them and allow them to dissipate back into universal potential energy.
Since resistance leads to persistence, simply allowing does not add energy to something we no longer want in our reality.
By having some understanding of energy and focus, we can start taking control of what we experience and we can introduce positive energy into situations we perceive as negative.
It is not our responsibility to change the experience of others, for their experience is their journey, but as far as it comes into our awareness, if we want to change our experience, we can project the energy of love or compassion to others.
You may be interested in reading about a form of energy healing called
Ho'oponopono that addresses this type of healing experience.
Marie