HeartbrokenšŸ’”

My boyfriend and I have been talking about starting our own family for a few weeks, and last night he told me that he really wanted to, it was the best feeling in the world.
So this morning we was talking about it, and then he suddenly comes out with no, he's not ready.
I'm crushed, and I thought he understood.
I have a disability that might mean I might not be able to keep up with my kids in the future and that's heartbreaking.
I'm not too sure what to do, any ideas?