When I handle my Dumeril's boa, most of the time she will just sit curled up in my hand and not do anything. Not even move. Do you think she may just be stressed out?

Also when I don't handle her when I put her down, she slithers really fast to get away. She's a very sweet snake though, but I don't know if it's her calmness or her being stressed with the handling? I don't handle her too often though, but still take the time to handle her for a while.