Will his attitude change when the baby comes?

My boyfriend and I have only been together for around 6 months everything was great at the start and then around 2 months in we found out I was 4 weeks pregnant, this obviously came as a huge shock to us as it hadn’t been planned or expected but none the less we both got excited and my boyfriend promised to stay with me and support me,

At the start when we found out we sat together and picked out items, not including clothes, that we would need for our baby so we had a rough idea of how much it was gonna cost so that neither of us were shocked by it, at the time I was in a part time job and was only really able to contribute £50 a month whereas my boyfriend was in a full time job and said he was able to put away around £600/£700 a month more than we probably would need in the long run but it would be good incase of emergencies

About a month passes from when we found out and I was diagnosed with hyperemesis which is basically intense morning sickness which can lead to severe dehydration and malnutrition which needs hospitalisation which has happened to me 7/8 times now so at the beginning I had to go out of work sick but with no pay as I had sick time off earlier in the year due to mental health issues and used all my pay then so the only money I had coming in was my benefits which didn’t fully cover my bills and left me relying on my parents for support my partner said he didn’t mind taking over saving alone as that’s why we were saving the extra money and promised me everything would be okay so I left it to him and assumed it would be okay

I’m now 16 weeks pregnant and I decided to ask my boyfriend where he was with the savings as I’d been panicking about it for a few days, he got angry with me and said the stuff on the list was too expensive (just basic necessities like cot, car seat, pram etc nothing not needed) and that he thought I was just with him for his money and then said he only had £250 saved and that he wouldn’t be able to save much more than that

My boyfriend works in a well paid job for his age and has a monthly excess of around £800 after his bills come out and I’ve seen this myself and he’s told me this, he lives at home with his mum and he said he’s been helping her out a bit with her bills which I completely understand but I’ve now been left with the responsibility of providing everything for the baby thankfully I have family that have been generous as a few babies have been born in my family the last few years and I’ve received a few things from them

I feel as thought my boyfriend doesn’t care anymore as he’s still smoking cigarettes and weed (both of which he says he will give up before the baby is born so why not now?), going out with his friends, having takeout for lunch everyday while he’s at work and sometimes for dinner and looking to buy a new phone and I’m worried about when the baby is here he isn’t actually gonna step up and help out with nappies, formula, childcare for when I’m in uni or additional costs like toys etc and I’m going to be left with it all

On top of the money issues we’ve had a lot of arguments about when the baby is he, in the days leading up to the baby being born, me not being able to give him the same amount of attention as before I got pregnant because of the sickness etc and I kinda feel like he’s not the same guy as he was at the start of the pregnancy

Will his attitude change or should I just leave it here and try work it out as friends because I know if I’m left with all the costs and he has none but still gets to benefit and play the amazing dad while I’m struggling It’s going to ruin the relationship