We were taught in nursing school that anything over 160/80 was high. Once I got into the medical field and had hands on experience, I realized the norm was about 130/80. Different studies will vary a little.
Are you overweight? Do you exercise? Your resting heart rate will be lower if you are an athlete (or frequently get cardiovascular exercise). I've seen pulses in the low 50's from an athlete.
You can always check with your doc.