Overthinking?

My boyfriend has talked about wanting to marry me and our wedding plans and having a family with me and then he will switch to wording it like "if I ever get married" and "if I ever have a kid" and when I ask if why he words it that way he says he could die before we get married or start a family the other day he said he would probably talk about a baby once his credit card debt is paid off but today its "if I ever have kids" what does it mean when he changes wording like that? Does he want a future with me or is he wording it that way because he isn't sure what kind of future we have together. I'm not as young as I sound in this post i just am struggling really hard with my crippling anxiety, depression, and bpd right now and I'm overthinking everything please send help.