Definately u will feel insecure. Just slowly make ur moves. Cause once she is yours.. u know others can only see. While u are the one..mmmm...mmmmm *smakcs his lips* u know what i mean. So now u just gotta work harder in getting her.
I think u just gotta make her feel comfortable and secure. Be the MAN. And just let her do her stuffs while u are there.. she will come back to you again once she is dont with whatever she is doing. I think she is that kind . But at least she tries to be all angelic in front of you.. coming back to you and all. So thats not too bad. Just dun act like an @ss hole or intrude on her stuffs. Only do so when in private.
My ex is kinda like how u describe.Guys always checking her out , approaching her and the way she dances.. is like dancing on an invisible pole.. *thinks back* oh yeah...girls that know how to move their hips like that...

anyways... i let her have her fun. Cause in the end of the night/day she will still come back to me.N when u are around guys approach her , she dun really hiu them.. u know u got it takes to be her man.