To see yourself breaking down a wall in your dream is symbolic of overcoming your fears and letting others in. Vulnerability and fear of being taken advantage of may be some of the factors that played a role in helping you construct these mental and emotional walls in the first place. However, at this current state, you feel like you are ready to demolish these ways and take chances with life.
Dreaming that the wall is broken also can be interpreted as you overcoming all adversities to reach a goal. There is no longer anything to block you from achieving what you desire. Seeing a broken wall parallels the notion of freedom and not being in confinement anymore.