Please identify this plant
I am in India. I have this plant growing on its own outside of my house...
(This photo was taken a month ago)
It got me interested and I kept watering it to see what comes out of it. In a few days, it has grown a bit taller now (around 3½ feet) ...
This week, it started budding and they look new to me.
The leaves of the plant have a pleasant smell and I often see black ants hanging around the base of the plant. I tried identifying the plant by searching everywhere on the internet but couldn't. Can you please help me identify this plant?