how do i fly into romulan space? or where is it located?

To be honest, I have not managed to get that far. My job has been keeping me rather busy. I am waiting for playable Romulans mostly though. Until then, the Vulcans will do just fine.

It's the area north of the sol system, the alpha centauri sector block I think it's called? If you look at the big map of the galaxy romulan space is at the top. If you've been to Memory Alpha you were in the right sector block.

Romulan space is located in the following sectors: Alpha Centauri, Psi Velorum and Iota Pavonis.