Having A Brother So Unique?

Is it really love that goes on a 16 year old brother of mine? My brother is a very sporty person, but less on mingling with other person, on my observation as we grew up, he never showed any crucial thing that would make our family embarassed. But now im far from him, i don't think if i still knew what my brother was... it seems he changed a lot... the way he views things in life. My brother is a very simple person, he dont like extravagant things in life, his contented as long as he play and have gifts such as toys... wayback elementary and until his 2nd year in high school... i never new he would have a tremendous change, when he started asking me how to please a girl upon courting... i never realized that questioning would lead to his stubborness to me and to our loving parents... All of us know that our parents only want us in good condition in life in the near future, but my brother think it negatively... and act rebelliously.I dont know how he got that mentality of doing that...well as what God gave us the agency to choose what we thinks best for us. There's a lot of times i tried to understand what he is acting right now, maybe his just on a state of confusion on what really life meant for him and to us his love ones. I often give him reverse psychology and advises he listen for a while and after i would leave him to go far from home to go to school he would have forgotten it... i wonder why? and then i realized maybe he just got a temporary amnesia...lol... but come to think of it, how can he handle such life that seems so sad because he dont want to express himself to us his love ones...There were several times i ask him to share whats happening one his life now, and he answered too little and too puzzling... he narrate a little background on the girl he admirers, until he got on a relationshipship but its only on "sms", he sends gifts to the girl sometimes like stuff toys and months have passed they broke up, two of his x-girlfriend was of that situation... but the dissaster is here with his latest girlfriend named "_ _ _ _ _", i never liked this girl, i think shes just tooking advantage to the kindness of my brother. My brother is really insanely and blindly inlove with this phatetic girl, who happened to be the younger sister of my high school batchmate.And I hope God would help my brother to see whats best for him...