Does this break girl code it's an emergency

Soo I really need help with a situation.... I really liked this guy and my friend did to so for her sake I pushed my feelings aside and he was my best friend for the longest time but they broke up about a month or so ago . She broke up with him because she didnt love him and after that he was heart broken so I helped him through it ... And we got closer and I started to have those feelings for him again and he did to and we hung out yesterday and we kissed and I can't help but feel guilty .I know she wouldn't care because she wants him to be happy and she doesn't feel any romantic feelings for him ,but I need help .what should I do ? He makes me happy .