I ended my relationship because I was too afraid to tell him he is bad at sex

I cant believe its been 6 months. I miss him so much. We ended our relationship because I was too afraid to ask him why his penis was so small. I was too afraid to tell him he was bad at sex. In 18 years, I never encountered a penis so small. I couldnt feel it inside me. We never had sex. I considered him cheating on me by not being able to fulfill my sexual desires. He was more upset when I told him the truth. I dont know if I will ever meet someone again I would never want to leave.