There is no fixed rule about who should make the first move when someone likes another person. Traditionally, it has been more common for guys to initiate romantic advances, but societal norms have evolved, and today, it's perfectly acceptable for either gender to take the initiative.
Ultimately, the decision about who makes the first move depends on the individuals involved, their personalities, cultural background, and personal preferences. Some people may feel more comfortable taking the lead, while others may prefer to be approached.
If a girl likes a guy and wants to express her interest, there's no reason she shouldn't make the first move if she feels confident and willing to do so. Likewise, if a guy likes a girl and wants to take the initiative, he should feel free to do so as well.
The most important thing is to be respectful, considerate, and clear in your communication, regardless of who makes the first move. Open and honest communication is key to building healthy relationships. If you're interested in someone, don't be afraid to express your feelings or ask them out on a date – it's a natural part of the process of getting to know someone and exploring the potential for a romantic connection.