What should I do!? Im freaking out! My sisters boyfriend just confessed his love for me to me!! I can't face my sister after that

I would not want my sister hurt so I would tell her. If you don't want to do that, I would stay away from her boyfriend. Do you like him?
My sister and I have the kind of relationship that it would be no problem for me to tell her if her boyfriend was a cheater. How is your relationship with your sister

I would not want my sister hurt so I would tell her. If you don't want to do that, I would stay away from her boyfriend. Do you like him?
My sister and I have the kind of relationship that it would be no problem for me to tell her if her boyfriend was a cheater. How is your relationship with your sister

Ok first I don't like her boyfriend at all... and our relashionship is good but her heart is so delicate... and I don't know if I can tell her