Really sad news... guinea pigs are ace.
I'd recommend getting him a (neutered) female friend. If you know a rescue/ rehoming centre they should let you take him along to se if he'll be OK with his new companion. When my daughter's Guinea pig Charlie died it was really sad for Ash (his girly friend) but now she has a new man in her life (Bill) who is squeeky, funny and very cool. They get pretty upset when they are separated and love nothing betterthansharing a bunch of dandelion leaves.
Cavy Power!
he seems fine, still smiling
ryan keeps him entertained
gonna see how he gets on, then maybe get him a little brother/son if he gets lonely
see how it goes, he may enjoy having the space to himself.
matchmaking piggies is quite amusing especially when one is quite big. elizabeth showed off some pretty dirty judo moves during her matchmaking and she looked like a right heffer as she was 3 and the babies were only 6 weeks old!