Most Helpful Girl
Clearly, she has chosen you as someone she likes to be around and flirt with and she may even have fallen for you to an extent. With her having a long term boyfriend it makes things even more difficult because the question lies in where is she at in that relationship? It's not a good sign for someone to be disloyal, however, what if she accidentally found a larger attraction for you than her boyfriend? Sometimes we think we know who we want and who we love until maybe someone else reminds us that there can be more compatible and deeper connections with someone else. Whether or not this is the case it is still her responsibility to take care of her long term relationship BEFORE taking things with you to a romantic level. If I were you, I'd try my best to avoid her and if she gets sad, then realize that you are trying to be the better person and sometimes that hurts. If there ever comes a time that you two can talk openly about this, help her understand that you like her too but you respect other peoples relationships and won't cross that line. If she is serious about you and if her long term relationship is not something she wants or can reconcile, she'll figure out a way to end it with him. If it's just a cry for attention because her relationship has gotten a little dull, then she most likely won't leave him and will, sooner or later, get a clue that she needs to focus on her boyfriend and not you.