Share 'sucking my energy out @_@'

Everytime me and anyone I'm with (usually hubby) and we're somewhere that has lots of people, I feel so overwhelmed and tired. It feels like all the energy of everyone around us just overwhelms my energy and is depleting it.Has that happened to anybody? And what would that be called?     ETA: after being in situations like this, I feel like I have to be by myself to recharge my energy...