@Emmaemma23 please don't do anything in anger or make decisions now. Regardless of what's happened between you, he needs to be on the birth certificate - remember, that's for your child, not for you. He's the father and has rights here.
This may be unpopular, but I see many are jumping to call him out... but in reality we don't know what has happened in your relationship, how you have behaved, how he has behaved, so strangers on the internet cannot really have an opinion here.
Your child deserves to know their father, and he deserves to have a relationship with them. Acting now in spite will only have negative impact for your child in the future. As much as you're hurting now, he's probably hurting too. You both need to calm down and put the baby first.
Trying to make things "as difficult as possible" is not a good move. Your relationship ended and that is hard, very hard for you both... but you have something bigger to think about now and need to push both your emotions to the side. You'll get over it, as will he. But decisions you make today will have serious ramifications for your child when they are older. Remember, they didn't choose this, and the only one you'd truly be hurting is them.
If you do decide to have a termination or go down the adoption route, try and break to news to him calmly. If the latter is what you choose, perhaps giving him custody of his child isn't a bad idea. You have options, but you need to think carefully about what to do next.