need advice.

so before I met my boyfriend I was talking to this girl. my boyfriend and I have been dating for almost 9 months now, and me and that girl recently started talking again, just as friends nothing more, he knows about her and everything that happen. So she told me that she still likes me, and I didn't say anything back. but I still do, i mean I love my boyfriend but I do still have a strong attraction to her. Should I tell her? Or keep it to myself? I don't know what to do.