Having the baby is your choice and it has to be a real choice, with both options considered totally freely and weighed up. This means considering the effects on you and the baby. I'm afraid your boyfriend is not now the no.1 in this, which he knows and which is why he's reacted the way he has.
Abortion is often loaded as the 'sensible' option, but if your instinct is that this would be wrong for you, it's very important to take on board the psychological impact it could have on you.
To offer my experience - I became pregnant at 21 and felt exactly as you do (recoiled from abortion instinctively but was scared of how I'd have a baby at that age and in that situation). Everyone around me reacted as your boyfriend did, and told me to have an abortion. I couldn't go through with it at first, but then did. The impact on me psychologically was so devastating that I can honestly say the whole course of my life was thrown out and I live the effects still today. It literally destroyed me. But that is me, and I'm only saying this because you need to be aware that you might react v badly to abortion. It's something that isn't always clearly factored in, I think. It's easier to predict the challenges you'd face having the baby. Having the baby against his wishes may well mean you lose him, though. Having said that, his reaction has been selfish and not very supportive, to say the least. He's not allowing you to make a free choice.
The most important thing is: don't feel bad about either choice. It is genuinely your choice. Don't feel heartless if you choose abortion. Don't feel reckless if you choose to have the baby.
You must do what you feel to be right for you.
If you have the baby, things will arrange themselves and you will get through somehow. The challenges are mostly practical, and you'll have the positive boost of love to tell you.
If you have the abortion, the challenges will be more psychological, in my experience. What I hadn't properly understood was that people may offer support, but you will be entirely alone with your possible grief and self-recrimination, and that will be with you for life.
Either way, your life has now changed and won't be the same again.