Shoutout to @MayaRocha16 for the idea! Hope these tips and advice help :)
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a. How to Deal With Boys
1) TALK TO THEM
Boys have a tendency of ignoring people! because they feel they know more. Instead of ignoring them because they do it to you, show them you care about them and are interested in them. Talk, but remember to listen as well.
2) GIVE THEM SPACE
Teenage boys are always going to want to be cool and hang out with friends. Let them. Don't constantly hang around them. You should give them some freedom.
3) OFFER ADVICE
Boys think they know everything, but truth be told, they always have some sort of problem. If they trust you with secrets or problems, remember to give them as much help as possible.
4) STAY IN CONTROL
This doesn't mean keeping him on lock down, but don't let him use abusive language, etc. Rubbing his arm gently while explaining something to him is a hypnotic way of controlling his behavior.
Note: Physical contact or touching does not work on all teenage boys. Some react violently or may pull away from the touch.
5) ENCOURAGE HIM
If he is interested in something, persuade him to go further, and show him you're supporting him. It gives self esteem and overall happiness.
6) SPEND TIME WITH HIM
For females, it can be a bit awkward at first, but ask him if he's alright or wants to talk about anything. Boys will have a lot of nervous breakdowns when stress piles up. Make sure you spend time together to get to talk and find out things about his life without snooping.
b. How to Tell a Boy You Like Him
1) PICK THE RIGHT MOMENT
Timing is everything, as the old saying goes. "Make time for a casual exchange when both of you aren't preoccupied with something else."
Try to get him alone. If he's surrounded by friends, he might respond based on their presence, not with how he actually feels. Don't worry if you can't catch him alone, though - just quietly ask if he has a minute to chat privately.
Don't rush. You don't want to be nervous or hurried. Asking him as you're trying to spring to class, or he's on his way to an appointment, is a recipe for disaster. Instead, choose a time when you have some flexibility, like after school or at lunch.
Pay attention to his mood. If he seems particularly grumpy or quiet, it might be best to wait for another chance.
2) START A CONVERSATION
This may feel tough, but it can be surprisingly simple. An open-ended question (that does not have a yes/no answer) is a safe place to start.
Ask about his upcoming plans. ("What are you doing this weekend? I wanted to...")
Ask his thoughts on a common experience (teacher, friend, class, etc.). ("Did you see...? I though that was...! What'd you think?")
3) MONITOR YOUR BODY LANGUAGE
Open, attentive positioning will get your point across - perhaps without even saying it.
Lock eyes. Eye contact will tell him that you are listening to him and you care. Shying away from eye contact shows you're nervous and less approachable.
Posture. Make sure your body is open and pointed toward him. Tilt your hips toward him (if standing) and make sure your arms aren't crossed.
Touch. Make excuses to touch him in appropriate, light ways. The bond of human touch subconsciously puts a human more at ease. Lightly lay your hand on his forearm as you're talking, or gently bump his side if you're walking together.
Mirror his positioning. Getting into a physical groove with him will tell him you're similar. Humans are programmed to seek out those like us.
Always, always, always smile. Not only will it make him happier to be around you, it'll up your mood too!