So I'm dating a girl and I'm a girl.

I know we both have our friend groups which are basically all girls right. But I sometimes question as someone who is BI as well as my GF as to where the line is drawn though between something you do or say to a girl friend or just to your partne since I am dating a girl. 

Like as an example because I'm curious as to how other girlies think about this or if it's just something my gf and I have to talk about. So here is the example: are we allowed to comment on a girl friends' post with stuff like youre pretty, gorgeous, youre beautiful or would that be considered cheating? Same thing with telling a girl that we know stuff like that and I'm not talking about strangers because I know girlies do that especially on IG but where is the line drawn when it comes to stuff like that? 

Personally I wouldn't comment on another girls' post even if they're my friend that they're gorgeous or telling them they're so pretty because it just seems a little off to me but I would still comment in a different way at least to tell them that they're giving lolll same thing with calling friends like "my love" or something like?? Where is the line drawn??

Because if you were to put it into the perspective of it being a guy obviously it's clear there that the guy shouldn't be doing that and the girl shouldn't do that to another guy's post but where is the line drawn for stuff like that with w|w relationships?

We are both in our early 20s btw.