What does it mean if a guy wants to do something serious like build finances together?

He says he doesn’t like me that way or want to be with me but he wants us to build up our finances. He’s been on me about doing side hustles to make extra money and everything lol. He used the term “we’re”. I’m just wondering why he would want to do something that people in serious relationships do when he says he doesn’t see a future for us. What are y’all’s thoughts on this?
What does it mean if a guy wants to do something serious like build finances together?
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