Extreme shyness / seperation anxiety. | Autism PDD

My son, 8 yo, PDDNOS/Apsergers, hates to sleep by himself. He doesn't want to sleep with us. He wants to sleep with his 11 yo brother. They share a room, and each have a twin bed, but he constantly is trying to sleep in 11 yos twin bed with him. 11 yo doesn't always mind, but now sometimes seems to want some personal space, and 8 yo cries and cries. He is very shy and also will not join any activity or go hardly anywhere, unless 11 yo is glued to his side. We tried them in separate rooms before and 8 yo slept on the living room floor every single night for months, b/c he didn't want to be in his bedroom by himself. He won't join cub scouts, because he would be in a different den than 11 yo.

11 yo has issues too, and I am glad he wants his own space for a change, so it seems we are at odds. Not sure what to do and how to help 8 yo to deal with things by himself now and then, or if not by himsefl at least more than a foot away from brother. Help.

I don't have any answers but thought I would bump this up for you!

I am not much help my son who is 6 also wants to sleep with his 10 year old
sister. He also is shy I can not get him to join sports even though he seems
interested in them. He says I won't know anyone or people will be staring at
me. When school started his sister also wanted her own space so we said he
had to sleep in his own bed-he wasn't so happy about this but after a few
crying nights he is doing better. We also made a deal that on weekends he
can sleep with her and we check on him often until he falls asleep and that
seems to help his fears some because he knows we are loking in on him