I am a 27 year old female and I weigh about 119lbs. Is that dangerous? I eat three meals a day, stay health and such. I also have a high metabolism.

Depends. Whether 119 lbs is a good weight or not depends mostly on how tall you are. If you are 6 ft plus that is far too little weight; if you are 5 ft 2 inches it could be a good weight. See your doctor and discuss your ideal weight and how to get to it and stay at it.