crawl errors in google webmaster tools

my site easyfriends.com has many crawl errors in webmaster tools.

anyone has same problems? anyone can solve them? i dont have spam users as i delete spam users instantly.

awaiting reply from google seo and boonex experts,

regards, ceo of easyfriends.com, contact@easyfriends.com

Some errors will not effect your SEO.  I have two errors myself, but nothing that will effect SEO. As per Google

how can you tell what will effect seo?

is this bad

Site Errors Showing data from the last 90 days

 

 

DNS

Server Connectivity

Robots.txt Fetch

here is the list of errors for my second site

Site Errors Showing data from the last 90 days

 

 

DNS

Server Connectivity

Robots.txt Fetch

again i have no idea if it is real bad or not, it might be hurting my seo if so i need to sort it out

 i got many errors in google webmaster tools.

around 9000 pages not found, 100 404 errors :( 

, please help.

regards, ceo of easyfriends.com , contact@easyfriends.com