I have no idea what Tagged is, whether on-line dating or chat or whatever, but I expect one answer applies to all: by all means, invite her to meet you-- a casual meeting for coffee or something, just to chat in person.
Do not, however, tell her that you want to meet her because you have a "crush" on her. That will scare her away, because she'll either think you're an internet stalker, or a pathetic geek who can't find a girl except through a computer monitor.
(You're neither of those, are you? Or, are you?)
When in trouble,
Or in doubt,
Run in circles,
Scream and shout.