How do I fix the energy leakages in my solar plexus chakra?

I've noticed a trend in my life following certain discussions or being in the presence of dominant personalities, I'm totally drained. It's not an emotional drain; it feels as if something is extracted out of me. I recently discovered that the solar plexus chakra relates to personal power and boundaries, and I believe mine is leaking energy. How do I repair these leakages and seal off my solar plexus chakra so that it won't be drained?