It’s not an ideal situation

I’m not entirely sure where to put this post so I’m posting it here. Ive started seeing someone new, when I say new I mean 2/3 weeks new & I’ve recently found out I am pregnant. The guy has told me he does want a life with me, marriage and children, I told him I was pregnant the minute I found out and he’s 100% stood on me not having it, I understand his reasonings… because it’s been 2/3 weeks. The problem is, when it happened when we had sex I said to him let’s get the morning after pill and he replied with its okay, it doesn’t matter. Now we are here in this situation, tbh I am more than okay with having the baby but he isn’t. He’s made jokes about if I keep it I’m going to be a single mum. Right now I’m at a crossroad.

Edit: I’ve known him for 20 years. He isn’t a new person. I’ve known him since primary school, when I said he wants marriage etc its something he’s always wanted