A phrase I'm unable to remember.. please help..

When im in somebody's presence, if i feel very self-conscious, like im not good enough or maybe like feel the need to prove to that person (or others present at the time) that im not any lesser than him/her

In such a situtation there is a phrase people normally use
"I'm _______ by his/her presence" or "I feel _______ in his/her presence" or something of the sort

I need the word that's used in the blank i gave in the examples.