Flowers are 2" across. Petals are thick and they keep 4-5 days in water. Scent is strong spicy/fruity. Flowers are very dark red almost black before they open up.

Person I got it from said it came from a cutting a friend had brought back from Hawaii.

Thanks!

I have an inkling but generally don't like identifying from just a picture. More info about growth habit of the plant, picture of the leaves etc?

plant is about 5 feet tall

You might have Hilo Beauty there. I'd label it 'possibly Hilo Beauty' if I were you.

even though the flowers are only 2"?

Your plant looks like it is not growing in an ideal environment. This could account for the smaller flowers.
I'd repot with more soil.