as aj said this pill doesnt contain an "ecstasy" substance. most likely its a speed or caffeine pill.
when your friend said "ok" what do you think she meant?
here's a few possibilities:
"i didn't roll but i'm not going to tell you that because...
a. ...you paid me money for them"
b. ...i paid money for them but don't want to look like a dick to you."
c. ...i've never rolled in my life, so don't know what it feels like, and i'm not about to admit that to you."