Am I a horrible friend?

[?ädjå £îz?]

I've liked this boy since 2006, and obviously I told my BFF. She said she was hoing to help me and stuff, but she fell for him too after a few days. Anyways, we got kinda separated when she told me that she liked him too, I mean WTF!?, I was hurt! Last year, not long ago, I told her I didn't like him anymore so everything would get back to normal, but I was really lying. We both still like him, but I have more chances with him because he lives in my neighborhood and my BFF lives far away. Today he aked me to go for a walk with him in the park, and after leaving he told me he really liked me and asked me to meet him again tomorrow. Should I tell my best friend??? I mean I feel a lil bit guilty because I lied to her, but I really really like him!!!!!!!!