1) Yes, you're going to confuse the passion (or generally the fantasy of it) and the hot sex with affection and some type of "real" connection. Keep those emotions under control. Fall in love for an hour if you want but emotionally know when you walk out the door it was all a performance.
2) Be care what you share here. You never know who is reading this and even little details (I'm married and we both travel a lot -- I suppose suggesting you get lonely a lot so found your way here -- might sound familiar to someone. Who knows maybe your wife is a touring girl and you probably don't want your neighbor or some random coworker or client putting some piece together. I don't think you've crossed any line her but don't confuse the forums and helpful comments with some safe place where you can let your guard down.
3) You can start relaxing things and even think about whether there might be some type of relationship after you've got a year or two experience -- by then you should have trained your emotions and your response to the normal chemical reactions in your body. You're probably working of the reaction function from when you were in high school or college right now.