It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.
Language claimed in HTML meta tag should match the language actually used on the web page.
The Chat-up: Fancying someone you work with is not a criminal offence and neither is asking them out.
Are you in any danger of being accused of favouritism if you start to see each other outside work?
CSS files minification is very important to reduce a web page rendering time.