Awww, poor Tyler. Have you checked on the internet for groups. Do you have a Gymboree around you? It's a fun place for the little ones. My oldest niece went there when she was a baby. Of course, she is 16 now, so maybe they don't even exist anymore. LOL
Or how about day care? Even if just two half days a week. I know it can be expensive (I was a daycare teacher for 12 years) but it would be a great experience for him.
Just my ideas.