Is it really that hard to wait?

Is it really that hard to wait for a spouse to engage in s*xual activities? My response is no it not's that hard if you know Jesus. I was just in a relationship for a almost a year and me and my girl talked about s*x almost every time we was on the phone. I am a young minister and satan tried to get me to engage in pre-marital s*x with her on several occasions. Everytime we were alone she wouls try to seduce me, so we ended up at a point where I didn't want to be alone with her in fear of what would happen. I spoke to many friends about it and they said I should just go ahead and do it, but my relationship with God said NO! I prayed and fasted but the issue still came forth. I told her that God told me that if we had s*x that she would get pregnant...and I wasn't ready to be a father. She backed down for a minute but then the urge returned and she really started to pester me about having s*x with her. At the end I ended up beaking up with the girl, and now she's mad at me. Was I wrong for telling her I loved her but refused to have s*x with her. My christian brothers and sisiters hit me up and encourage a brother let me know what you think about this.