If the baby not the problem then what is🤷🏽‍♀️

So I was dating this boy name jay for a whole year almost,so we always been on and off even after he cheated on me with my bestfrn we ended up having a fight so we no longer besties but after that I still took him back and he so toxic idk what his mood gone be the next day he don’t know if he want to be my boyfriend or not he feels like if he can’t do it I can’t nether like smoke he loves to smoke weed all the time so I can’t smoke if he can’t only reason why he can’t is cause he have an ankle monitor and he gets drug tested but on day he did sum the got him put in rehab so while he in rehab we was still going out but I found out I was pregnant and I I was already 4 months and by December he got out of rehab and I’m already 8 months finna be 9 soon so he finds out I’m pregnant but he acts like he don’t care but he do at the same time cause I told him I’m not pregnant by him so by January 23 my son is here now and now he want me to do a DNA test to see if the boy I say the babydaddy really the baby’s father he don’t want it to be the other boy’s baby he wants it to be his baby sooo bad even if it ain’t his baby he still wanna be a step daddy to my son but he stay acting like he don’t won’t nun to do with me he talks rude declines my calls flirt with other girls on live I just don’t get or see what he won’t do he want a family with me or what???