What is keeping peers away from my son( though he does not have autistic features anymore)

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My son who is 3.5 is verbal, understands questions, answer questions appropriately. But something is keeping peers away from him. I dont know what it is. Most simply dont want to play with him. He does not have the typical autistic traits like hand flapping, toe walking, screaming and bumping into others anymore. Could it be his verbal apraxia--he has mild verbal apraxia and offlate stuttering as well? or his body language - he sometimes touches children a bit too much I feel? Any advice? I am very perplexed by this and dont know what to do. Can anyone guide me on how I can make my child more socially smarter- Any book, any tips advice, can be of great help to me. Thanks,Navina