Your 'Home' page and 'Gallery' validate OK for me. On your 'About Me' page the only warning is that you have used '&' in 'Leisure & Tourism' when you should really have used 'Leisure & a m p ; Tourism' (spaces added to prevent this forum rendering it as &).
There are several errors reported on your 'Contact Me' page but this is because you have used capitals for some markup code when only lowercase is allowed in XHTML. e.g. you have used </P> when you should have used </p> and 'POST' instead of 'post'. If you correct these two problems then the other reported errors will disappear.