what to do about my ex ?

i recently discovered i am pregnant and i let my ex know. he keeps asking what i wanna do. and since we’ve been texting about this he’s been being very sexual. and trying to sext with me. and he keeps saying i wouldn’t look “cute asf” pregnant. and making sexual jokes about what happened that resulted in this. it’s been over a year since we split but last month we slept together and it got out of hand .. and afterwards he told me he didn’t want to be together. after i asked him. he said he loved having me around but didn’t want it to be the way it was before when we would argue all the time. we’re both very young and he knows he’s not really ready for a baby and i know i’m not either. but he says he doesn’t know what he wants. but i still love him and i can’t detach myself from him. idk what to do... he’s not taking it very seriously..