I need to know if this girl likes me she is always looking at me and she is not verry social or aprochable?

alright there is this girl shes damn fine! and shes always looking at me shes not verry social but she is always with her small group of freinds i went up to talk to her and she imeditly cut me off and told me that she had a boyfriend and not to interupt her while she was talking everyday since then she still looks at me she has like a aura around her that feels unaprochable it is realy hard to talk to her im kind of anti social as well i have my small group of homies and thats it mabey she just hapen to look my way by acedent i dont know if some one could please give me some advice that would be great