Cheating and a 4 month old

A

I’m sad I even have to write this but I recently found out my bf of 5 1/2 years and father of my baby girl has been cheating on me for the last 2 years.

I just want to know have any of you mamas been through a similar situation with such a small baby? How did you move forward? Did you forgive them? Because I have made my decision and I know I can’t ever forgive him so I am done but now I’m trying to pick up the pieces and figure out where to start. We have a house together too.

Any advice is appreciated. Ty.