is this sexual assault??

ok i don’t know if this is sexual assault or not or idk but if your boyfriend asks for a kiss and you repeatedly say no but you kiss him anyways just to make him stop is it considered sexual assault? because my boyfriend does that then when he leaves without one he come to me asking if i still want to be with him because i didn’t kiss him. i then feel bad because i mad him feel like that. this might be dumb i know but i just wanna know you can say i’m being dumb i just want to know