Question

"But soft! What light through yonder window breaks? It is the east, and Juliet is the sun!"

who is romeo talking to while saying this

Answer 1

Juliet

Answer 2

i thought it was himself when he was under juliets balcony

Answer 3

Himself. Juliet is not yet within earshot.

Answer 4

but whoah is this guy crazy ? He talks to himself as a theatrical device, eliminating the need for a commentator. The original staging would have been very simple. There wouldn't have been a balcony nor a light as props, so to convey the presence of some-one at the window Romeo talks to himself; a theatrical device