I wish I had had a grandma/grandpa. Well, of course, I did, but I don't remember them. There are pictures of them with the family, but I have no recall ever being with them.

It does sound like your grandma is a bit over protective. But maybe look at it this way, be glad you even have a grandma that cares. Maybe do something nice for her to let her know you appreciate her. Give her flowers or even a hug. Tell her you love her.