Is it okay to…?????????

My friend Lilly and her boyfriend James broke up. Lilly and I pretty close not like best friends or anything but I can confide in her. Her now current ex boyfriend James has been asking me to hangout alot more and last time we hung out he groped me. Lilly does not know I hung out with him. I also did not want him to touch me. I'm not a whore. I just felt bad that James had no one to confide in. Am I bad friend? I feel really guilty.