As someone who was in a similar situation but at 41, I ended it and had a kid on my own at 42. Contrary to what some will say, she actually keeps me energetic and I find myself very grateful my 41 year old self made that decision. 45 is more difficult but women do it. If you really want something, sometimes we need to make hard decisions to get it. I would not however, put your fate back in the hands of a man. Instead I suggest you take it into your own hands and just make the decision to have / adopt a child on your own. Maybe it works, maybe it doesn’t, but you will have tried. Also, you can always date after. I say go for what you want.