Yep, breathing is good!

Just remember that until you meet you really only have her online persona to go on so try not to get your expectations way up there only to have them dashed. I'm not saying they will necessarily but there have been a few stories here similar to yours - lots of emailing and IMing prior to meeting then once you meet, the magic isn't there. While talking and emailing are good initially, don't let your imagination fill in the blanks only to have a very different reality.