Estar is a singular verb in Spanish.
It would fall in the category of estar, as estar is a temporary verb and ser is permanent.
Contigo Quiero Estar was created on 1989-05-27.
Estar Banks was born in Boston, in Massachusetts, USA.
Estar sin ti was created in 1997.
Estar a salvo means "be safe" in English.
Es fantástico estar contigo. Me encanta estar contigo.
it is not possible because estar is temporary so there is no way that you can
Debes Estar Feliz Estar conmigo
It means "to be/stay in the house"
odio estar enfermo = i hate being sick
That is the correct spelling of estar, the Spanish verb "to be" (to be at the present time, as in something changeable).