I believe your plant is Medinilla magnifica. This is a very uncommon houseplant because of its very demanding requirements. It is native to the tropical rainforests of the Philippines where it is warm and very humid all year long. It is hard to duplicate those conditions outside of a greenhouse. Unfortunately, misting is an ineffective way to increase humidity. A nearby humidifier or a very large pebble tray would be more effective. Low humidity is a common reason that this plant fails to bloom.
Also, this plant normally has a semi-dormant period in winter when the soil is kept just barely damp and temps are in the 50-60 degree F. range. Summer temps should be close to 80 degrees and with the high humidity that is an uncomfortable environment for most people.
As I said, this is a difficult houseplant because of its needs which don't match our creature comforts. Do your best but understand your limitations.
