He Cheated 😩

My boyfriend brought his ex over while I was there at his house she was outside in the car waiting on me to leave I don’t know how to feel I thought he loved me he would tell me that so much and prior to this we been trying for a baby for months and I think I may be pregnant but I don’t know how to tell him or if I want to tell him I’m hurt I’m pretty sure he don’t care about me anymore or want this family thing anymore