Im confused

Hi, ive been dating and living with my bf for twi years this summer, hes 10 years older than me and has two kids, till this day the kids have never shared any moment with me, nor met me but he always speaks of how his las two partners were involved with them, i love him and we have our house amd all but i think i might have been super dumb in allowing this to happen please tell me im not stupid!!!