I am dating a girl since 3 years. We both have jobs. We want to take it to the next level, marriage. But she is scared of our future. Your opinions?

She thinks we should save money, buy our own house and a car before getting married. I know this is possible but it will take years. I don't want to be a old father.
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I will discuss with her and I will try to convince her. If she is adamant then I will date another girl bcoz I can't wait for her too long. I want to start a family and make babies.
I am dating a girl since 3 years. We both have jobs. We want to take it to the next level, marriage. But she is scared of our future. Your opinions?
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