You cannot tell if someone has high blood pressure just by looking at them. You can feel well and still have high blood pressure. High blood pressure is very common. You can only know if you get checked by a medical professional.
An unhealthy lifestyle is one of the main causes of high blood pressure, so developing healthy habits will help lower your blood pressure.
Managing stress is also important, because getting upset makes you blood pressure go up, or worse, spike. Try deep breathing, listening to music, getting enough sleep or other activities that make you feel calm. This will not cure your condition, but it will stop your blood pressure from suddenly spiking. Talking to somebody about the things that worry you will also help.