I caught him

I been struggling with depression after my first miscarriage , i just got pregnant I'm 16 weeks now & it's the second time I catch my fiancé messaging girls that we had issues in the past with I'm just so broken he said I set him up n says I'm crazy, I don't know what to do sometimes I wish I could just kill myself & this can be over but my baby is my motivation , I'm lost crying my eyes out cuz he can't own up or apologize he used to be the man of my dreams now Idk what happened