Partner isn't being a partner

Stella
My boyfriend was so happy when he found out -- now it's totally opposite. He still really wants to start a family but he is taking his stress out on me and questioning whether or not we're ready or can do it financially.. I feel like shit and alone as we don't even live together and we've been fighting... We were so Inlove what is happening.. He talks down to me and tells me what to do. He has completely switched. I need advice how do I stay strong.