hello there,
this is very similar to my son, he was born 14wks early, had wests syndrome which eventually ceased, caused by a bleed on the brain, he has cerebral palsy also, but is now 6.
i remember having the same worries about his social interaction, but honestly try not to worry, as it will come, my son was around a year old & i know it can be frustrating, but cp affects all children in different ways. it did affect my son quite badly as he is wheelchair bound, but socially he has no problems. he interacts with others, he can talk & always knows whats going on around him. remember, the docs will always give you the worst possible scenario, try not to worry too much, as it will come, just in his own time.
i found that taking my son to a group, where there was a sensory lights room really helped his ability to concentrate better which i believe in turn, helped his eye co-ordination, which helped him to interact better with other people. i wish you and your son the very best of luck for the future.
p.s. have you thought about speaking to someone regarding your sons oxygen deprivation?
xx