Help!!!!

The other night me and this guy I like were fooling around but while we were fooling around I got really nervous and stopped because I got this feeling I don’t know how to explain it but I just wanted to cry. Before me and him were talking I was cheated on. I actually walked in on the boy that I loved having sex with another girl. I’ve told him about this but idk I feel weird telling him that the reason I was so nervous was because I haven’t been intimate with anyone who I have feeling for since that happened and he knows that I’ve had sex after the boy cheated on me but no feeling we’re involved and I’m scared to tell him that I have these feeling because I feel it will ruin our friendship and even if I wanted to tell him idk how to say it so I don’t sound crazy