I have a blog. I made it in August, 2010. It has been awhile, but I am unable to make Google crawl on my site. I have requested Google to crawl but there is still no response. Are there any reasons of note why it is happening?
If you want fast and guaranteed crawling, create a google adsense account and ad the google ad to the source code of your site. You can do this just until they spider the site, and you can probably do it on pages that simply link to your important content, and which only spiders are otherwise going to be likely to find. Since they advertise based on content, they'll have to spider your site, discover it's existence, index it, and presumably index all of the pages that you actually -want- it to see as well.
Then remove the ads whenever you're ready.
You don't to request that Googlebot visits your blog. You don't need to worry. First of all, you just write as many articles as you can (but with good quality.) Advertise them among your friends then on social networking sites. Once your site start getting traffic, you'll automatically be included in search results.
Moreover, register your site with Google Analytics and Google Webmaster Tools. Those will show statistics about the actual activity of the Googlebot crawler.