If my site is new. (3 months old) My index.html page is in google… But Other page r not on google. Why?
Get more backlinks, generate a standard sitemap file, and submit to google, then be patient and wait. Also you shall have a navigation bar in all your pages which links page each other.
submit a sitemap to google and make sure your robots.txt file(if exists) is not blocking your inner pages or directories to Search engines, You don't need much backlinks for just indexing the pages
It will take sometime for the bots to index the rest of your pages. In the mean while, do as what Mani has suggested
well it will take some time usually more then 6 months to be indexed in google try to build some back links...