first of all, hi again everyone! Haven't been on this forum much lately, so if I say anything here that's already been mentioned, I apologize. Hope everyone is doing good! now, to the post:
one quick question: I don't understand how he ruins the weekends by not eating...what do you mean by that? Are you handling him too much maybe? That can definitely cause stress that will keep them from eating, especially the boas. They also will suffer from delayed stress...any major habitat changes or other environmental changes in recent months? Go back and double check everything about your setup, and check Rocky out for any signs or health issues (signs of congestion, any parasites like mites) If everything is fine, I'd say just leave him alone for a few weeks then try to feed again. As long as he doesn't start to noticeably lose weight, or acting strangly, I would't worry too much.
I'm by far no expert with the CRBs or BRBs, but this type of thing seems to happen often with all types of boas
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-David
Check out my pet pics at:
http://www.myspace.com/obx_fisherman
1.0 ball python (Pandora - don't ask)
1.0 argentine boa (Prometheus)
0.0.1 colombian boa (Athena)
0.1 hogg island boa (Andromeda)
0.0.1 brazilian rainbow boa (Inara)
1.0 Dumeril's boa (Hannibal)
1.0 kenyan sand boa (Diablo)
0.0.1 normal corn snake(Cypress)
0.1 amel. corn snake (Morgan LaFay) RIP 
0.0.2 baby corns (Romulus and Remus)
- 1 normal, 1 ghost
0.0.1 banded cali. kingsnake (Cain)
1.0 tangerine honduran milksnake (Narcissus)
0.0.1 snow corn snake (Valkyrie)
1.1 garden phase amazon tree boas (Pegasus, Lenore)
0.0.1 baby yellow amazon tree boa (affectionately called
Snuggles)
0.0.1 albino san diego gopher snake (maybe Octavian)
0.0.1 sandfish skink (Slick)
0.0.1 fire skink (Phoenix)
1.0 bassett hound/black and tan coonhound mix (Luke)
0.1 Boxer (Zoe)
1.0 bearded dragon (Leonidas)
1.1 ferrets (Ares, Enyo)
1.2 cats (Galahad, Ripley and Sassy)
2.0 rats (Pan, no name yet)