Why do people tend to get less interested as soon as someone shows commitment to another person?

It’s just a lot of guys do this. As soon as you show a slight bit of commitment towards them , it’s like they stop caring. I just want someone to be on the same page as me and I want someone that loves me as much as I love them , but I feel like this generation just runs on loving attention until that attention involves them actually being invested in their life beyond surface level. Ughhh so hard being a hopeless romantic in this generation
Why do people tend to get less interested as soon as someone shows commitment to another person?
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