Is ok to message other people while building a relationship

I agree with neet-one; if it isn't solid and established, you can talk with whoever you wish. The moment you commit, though, you can't be doing that anymore. ..well, you technically CAN, but, theres a plethora of reasons why you really, really shouldn't :l

Well, I see it as being exclusive with someone. Such as, you've asked the person out, you date, and after a period of time, you continue to see each other, and things become more serious than previously "just seeing how things go". If you need something easily pinned down, then the point where you both change your FB relationship status is one way... -.-

I'm jealous but I have the right to feel that way. But if I haven't said lets date then I don't have the right to say you can flirt with other guys even though you made it crystal clear you really like me.

Yeah... if you're interested in someone, don't play the game and do the run around. Nobody likes that, and may just get fed up. Best to be open about where you're at, and if you feel it's appropriate, make a move to take things a step further. If it's mutual interest/attraction, then there you go! :) Only if they say they need time to think, do you give them the space and the courtesy, once your intentions are known, if you've been seeing them for a while, or know them well enough at least. Otherwise, it just comes across as disinterest.

You need to talk to her about where you guys are in the relationship and where you guys want to go. I mean, this is a talk that was going to happen sooner or later and now that it's actually bothering you, the time seems to be here. Honestly, and I'm not trying to gang up on you but I'm just saying, if you can't even have a normal healthy talk about your potential relationship status with her, how will you actually handle communication if you are in a real relationship? You can't be afraid to have these kinds of talks or otherwise, your relationship wouldn't have lasted anyways.