Remember...takes time...2-5 years. I strongly disagree with this overused (IMO) statement even though many "experts" also make this claim.
I have survived infidelity in two marriages, divorced my first H and R'ed with my current one. In neither case did it take me 2-5 years to be about as happy as I have ever been in my life, overall.
I started dating right away after my XH moved out (and in with his OW). And I had FUN! There was definitely a downside to being alone at night and raising three children on my own while working and going back to school, but no, my new beginning was definitely positive overall, and within months of the final D-day, not years.
In fact I remember one day in particular about 5 months after we split, I had to meet my XH and his "lover woman" as I called her to exchange our children. They looked so scraggly somehow and I realized I was so much better in that moment. I realized they "deserved each other."
In my current M, after deciding (based on his remorse and other factors) that I wanted to forgive my H, it took me about two months to feel we were "fully reconciled." Of course that definition seems to be different for everyone. It didn't mean that I never had moments of remembering and feeling bad about what happened. It just meant I was accepting it all, moving on with my life, and not afraid to be happy again, and in fact would do everything in my own power to assure I would be happy again.