Bad mom

Yesterday my boyfriend told me i don’t know how to take care of kids we have 4 (8moths) (1) (3) (4) i believe him I’m trying but I’ve noticed the kids only want him they always prefer him I get sad when they want dada all the time I really try but I don’t know how to bond with them I feel uncomfortable around them because they always say something that hurts my feelings I know how dumb that sounds but it’s true and I don’t understand what to do they don’t need me here if they have there dad