I think you should to proper SEO for backlinks like Blog commenting,Article Submission,Social bookmarking,Forum posting etc
Google Page Rank basically a score for your website out of 10 based upon how important Google think you're page is in the whole scheme of web searchery.
It's not just work on how many backlinks you have in order to get High PR. Working with fresh and original content can be a part of getting High PR. Update your blog and and manage your link building in order to get High PR.
Backlink are important to boost your page rank as well no. of visitor to your blog also increase page rank,I think you should work hard on off page SEO techniques.
its a slow proccess buddy, but make some quality backlinks and sure in few months it will be increased.
Get lots of dofollow links from PR 4 and higher sites. Of course, it is important that the number of outbound links from those to be less than 10 for maximum link juice.
Make more quality back link as well as traffic. And for that you can use forum posting, blog posting, article writing etc.
Do regularly SEO On page and Off page techniques, so that you can be able to increase backlinks and traffic to your website.
Look for the method of pulling up only high page rank, dofollow blogs in google. You should then comment on these blogs using your selected anchor text. This will get you a very high quality backlink.
Website PR rank( Page Rank ) depends on number of backlinks you have created for your blog or website, more bakclinks means more page rank and more website traffic if you want to make popular your website then you must have more backlinks. here are more details about how to create backlinks and increase website traffic. whatisasite.com/free-website-traffic-and-best-20-tips-to-increase-website-visitors-traffic