I also wanted to add quickly, do you have a close friend/ family member you can confide in? You could probably do with a good cry and cuddle in real life.

You may also have to consider - as hard as it may be - that this may be the end of your relationship. I am hoping that this is not the case for you and you can both be happy with whatever descision you make. I'm probably judging a bit when i say this and i'm not saying it to make you upset or diss your partner but in my opinion it seems that your relationship may need to be reassed no matter what you do as from what you have said, you may have different expectations of each other for the future considering children