What is the ruling on a girl rejecting an unrighteous man who relies on her for the costs of marriage, and what should she do to stop people from talking about her, and what about a younger man who wants to get close to her?

A woman should not work in mixed-gender environments unless there is a necessity, while adhering to the hijab, avoiding softness in speech, lowering her gaze, and avoiding khalwa (private seclusion with a non-mahram man). Delaying marriage may contain wisdom, and age difference does not affect it, for the Messenger of Allah, peace and blessings be upon him, married Khadijah, who was older than him, and Aisha, who was younger than him. Marriage expenses are the responsibility of the man. A woman may offer herself in marriage to whomever she desires, and if he does not respond, then contact with him should be severed.