You need some professional support OP. Go see your GP ASAP and ask for a referral to someone who can help you to decide what you want to do about this pregnancy. Reason I suggest this route is to access a service that is unbiased as there are dangerous organisations around that mask as pregnancy advice but are actually religious and will subtly, or not so subtly, imply that you shouldn’t abort.
This is your decision, it’s your body. You’re the person who will have to grow the baby, potential suffer injury during birth or health issues, your ability to work and being an income in will be compromised, he’s entitled to his views but it’s not his body and so the final decision rests with you. I wouldn’t normally advocate deception but if you’re frightened of his reaction if you do decide to terminate some women for their own safety simply say they’ve had a miscarriage. Miscarriages are common. Relationships while so young are unlikely to last anyway so please do what you feel is right for you, not him.
I get the sense you’re leaning towards termination which is a very valid choice, you sound wise and mature enough to know that you don’t have the resources to have a baby, babies require money and there’s no way I could have supported myself, independently, plus a child at eighteen even though I was working. If you’re living with parents still you have to bear in mind they might not accept you starting a family under their roof. I think given your circumstances, age, and lack of desire for kids, terminating sounds like the kindest decision for both you and the potential baby (who at this stage is very much not yet a baby!).
It’s absolutley your decision, I wouldn’t wait before seeing the GP (make an emergency appointment, or go to a walk-in) as the sooner you see them the more options are available to you for termination (a day or two can be the difference between being able to take a pill and have something similar to a heavy period and needing surgery). Remember you don’t ever have to go through with it until the time comes. And if you decide you do want kids in the future this won’t affect your chances, many women who have wanted, planned children have had previous terminations. You get to decide whether you want a child or not. I wish you all the best and feel free to come back if you need support.