estabas mirando

you were looking

→ estar
phrase Rare #39,630
you were looking Used with tú to describe an ongoing action in the past. Depending on context, mirar can also mean “to watch.”
SP: Estabas mirando la televisión cuando llegué.
EN: You were watching television when I arrived.

Estabas mirando un poco.

You were looking a little.

— La increíble historia de David Copperfield (2019)

Siempre que te veía en el cine estabas mirando el piso.

Whenever I saw you at the movies, you were always looking at the floor.

— Whiplash (2014)

Tú no estabas mirando.

You weren't looking.

— Una segunda madre (2015)

Estabas mirando, ¿no?

You were watching, weren’t you?

estabas mirando.

You were watching.

— Battle Royale (2000)

No, no lo viste, estabas mirando el monitor.

No, you didn't see it, you were looking at the monitor.

— Avatar (2009)