I can't speak for you, but I had a similar experience. Maybe you can relate to some degree.
When I turned 20, I moved to a somewhat more 'metropolitan' type city. It seemed like overnight, I was scoring like I'd never imagined. The first few felt like great victories, but after that, it seemed like watching a repeat of a TV show.
I continued to take women home (or go to their place) because I was glad that I had the opportunities (options were limited before my move) . However, once the wad was shot, reality set in. And I'd either try to find some excuse why she and I couldn't spend the night together or I'd just go through the motions of pretending to enjoy their company (after the deed was done) .
I can't speak for you, but in my case, I had something to prove to myself. Eventually, I reached a point when I discovered that I felt "less alone" when by myself, rather than having random female company to fulfill my ego.