For what it's worth, I'm getting the impression that the OP is maybe letting out some feelings *here*, but remaining professional in real life. Maybe even helped along by being able to get out a few thoughts here where it's safe to do so.
In other words, by being able to write her thoughts down, she's more able to remain professional in the office where it's necessary. So far I haven't seen anything (in her posts) to indicate she's done anything other than remain professionally friendly with this guy.
This is also my impression. I think she's using us as an outlet for her feelings, and isn't that what we're here for?
There is nothing to indicate that she isn't behaving in an entirely professional manner at work.
"Playfighting" and "invasion of personal space" with someone you have professed romantic feelings to is not entirely professional. The OP has even stated that if other colleagues behaved in a similar fashion to her crush, she would not find that acceptable.
OP, it would probably be in your best interest (both personally and career-wise) to take things down several notches with this guy. I think you are well past the point of being harmlessly flirty friends, especially with the comments you have received from other co-workers (meaning, people are noticing your behavior). In addition, work may not be the most appropriate place to be flirty friends anyway! It was very brave of you to put yourself out there, and now you can stop wondering what his glances and touches mean. Better yet, stop the glances and touches altogether, and let him find a new toy to play with at the office.