LINE BREAKS – I’m a Newbie

I am just new to WordPress. (I used Blogger before but got fed up with all the glitches.)
I’m working on my blog now (eastmeetswestbookclub.wordpress.com), and am having trouble with LINE BREAKS.
When I type in (or copy over) text for a new post, it looks great in the “typing box” or window or whatever. (I don’t use indents for new paragraphs, I use new lines – you know, like a space between the two paragraphs).
But when I PUBLISH the post and view the new blog posting, all those spaces between my paragraphs are gone!
Help!