Hey Steve
Just to be straight forward it sounds like she wants her cake and ice cream. As u stated she is young and lives a different life than you but although she may have a “type” she is intrigued with you and doesn’t want to completely ruin things with u or let you go because of that. It’s not fair but in the same token she is single and as you stated you were aware of the circumstances when you became involved with her. So now it is up to you .. either you can continue to entertain her and the “idea” of you two accepting that there are others she has interest in as well, tell her how you feel and that you Dont want to play game’s that you want to move forward (and accept her answer at face value) or you can simply move on and open your dating options up to others who may be willing to give you exactly what you are seeking without the string along.