I have a high bite after a crown but the dentist says I just need to get used to it—does that sound right?

If the bite is not right, that is not ok. It needs to be adjusted as soon as possible to prevent irreparable damage to that tooth or to your jaw joint.  

HI:It’s best to go back to your dentist to evaluate the bite on the new crown.  Most likely it needs further adjustment.Best,Dr. Maddahi

Your dentist need to adjust the new crown or the teeth that hits the crown first. You can’t get used to it for the poor work he has left you to deal with. At times, if the high bite is minor, yes in time, the material will be ground down so your bite is better, but if the high bite is caused by a lot of excess material on the crown, you’ll never “get used to it”. I recommend you contact your dentist and ask him to adjust your “premature occlusal contacts” on that new crown.