Went soft during sex

Hey, so this is my second time having sex with my boyfriend. The first time I was a virgin and bled so we stopped and now we had sex today doing doggy position..and we stopped and was moving into missionary but he went soft. And I can’t help but think I’m the reason he went soft...Like was it the way I looked or maybe it wasn’t good? I can’t stop thinking about it. When I asked he said it was probably because he hasn’t have sex in forever. Is that a reason? I just think maybe it was me! I shaved and made sure I smelled good so I’m honestly just not sure what went wrong! Has this happened to anybody and do you know why??