I don’t know what to do😕

Okay so my boyfriend and I have been getting more intimate lately ( not sex) and he wants me to do stuff to him but I’m not ready and he keeps asking why and I don’t know ( I’m a virgin) and he’s getting upset and annoyed at me cause I won’t give him an answer and I just feel bad and just leave him alone. I need help I really don’t know what to do and I’m getting frustrated and sad and annoyed.