New user and excited

Hello brothers and sisters, I'm going to tell you why I want to start nofap.
Okay, let's get started. This is me two weeks earlier ready to have sex with my new girlfriend (I'm a virgin), things are going well and we are both taking off our clothes. She starts jerking me off and I get about 70-80% hard. I can see the difference, because when I jerk off to P I can get erected to maybe like 90%, but not as hard I used to get (I'm 18 years old). Okay so let's continue. I whispered "do you want me to take a condom", she said yes and my heart starts bumping like crazy, because I have never done this before. Okay so I put on the condom (My dick is like 70% erected) and I managed to put it on but it looked stupid because my dick was getting softer. I didn't know what to do and I tried to go in, but it just didn't go. It started getting softer and softer and I felt so embarrassed. Okay dudes thats not all. A week ago we tried to do it again and I got soft again, I think I have never been so embarrassed before. I think jerking off and P has been messing with my brain and I can't even get hard if it's not a women on screen. This is my first serious relationship and I think sex is really important and I want to satisfy my girl. I'm going to start this journey because I have heard really good success stories from this.

 

Sorry I think I started thread and this may be looking stupid.