Hi Victoria, and welcome to NGA. Glad you found your way here.
Yes, I can see by your photos that Bruce is dying from rot due to soggy roots.
Bruce also looks like you have been keeping him indoors?
Sempervivum are not an indoor type of plant, they do best growing in fast draining soil outdoors.
Good news is that it looks like there are new roots along the stem?
Leave the plant laying on the paper towel for a day or two, to dry out. Once it has dried a bit check for mushy tissue. Cut all of the mushy part off. Then plant the remainder with the tiny new roots into a dry potting mix. Be sure your container has drainage holes.
What is your weather like now? If it is spring like you can place the potted plant outdoors in a protected spot with bright light, but not direct sunlight. Do not water it for a few days, then lightly water it, just a sip or two. Soon it should take off growing.
