Subahan Allah, brother, no worries, Allah (swt.) helps the believers as he says in the Quran:
"
And seek help through patience and prayer, and indeed, it is difficult except for the humbly submissive [to Allah ]" (2:45)
Also:
Now let me clear some issues, honestly you don't need to feel so guilty for your brother.
And I just carried on home. In these situations I'm never thinking straight else I would've took him aside and spoken to him. I know that it's partly my fault that he continued to where he was going. I take full responsibility for it. May Allah forgive me.
Listen brother, your brother is now old enough to make his own decisions and that he has reached an age where he can judge whether something is good or bad. So you don't need to feel guilty for that, just mention it to him plainly and if he listens it's your credit, if not then it is not your fault. Remember Nuh (AS) was not responsible for his son, Lut (AS) was not responsible for his wife.
This is must watch for you and your brother, please, trust me both of you will understand a lot of stuffs after watching this:
http://turntoislam.com/video/133/youth-impulsiveness-temptation-responsibility-nouman-ali-khan/
So first of all, I ask for you all to pray for him. Secondly, I want advice on how I should attend to this...
Of course brother.!
Please do not ask me to ask my parents because I won't. We're not in a close relationship so if I told one of my parents they would be bound to just start shouting at him, and that's not my goal. Nothing will be resolved by verbal abuse off my parents except further problems.
Now I seem to understand the root of your problems. Mend your relationship with your parents and never think it is impossible. Recite Surah Isra, Ayah 24 for this
http://quran.com/17/24
I mean... in today's society, being a virgin at 16 is abnormal. I feel almost as though we're neglected. I'm not exaggerating when I say this. From the moment I look out my window in the morning to the moment I sit down on my laptop at night, there is a slim chance of me avoiding sin.
This is where you are wrong brother. You are born at the right time and trust me the harder the generation becomes, you can prove yourself to be more efficient than others, I tell you why. In olden age when people had less difficulty in retaining Imaan, a simple sin caused was actually more threatening. But as time goes, the Ummahs get weaker and so Allah becomes more merciful towards us and gives us more chances. You at the time of Akhirah all the dreams of the people will be set to come true so as to make them come towards Islam but then again keeping the Imaan will be like holding a charcoal in your hands so challenges will grow and as it grows you rather feel optimistic that you are in fact being honored of tackling the difficulties coming to you.
You look outside your window and see 100's of women uncovered. You go to your local store and the shopkeeper is uncovered. You chill in a park (even when it's not summer) and women have shorts on further up than their knees... You go onto youtube and there are ads promoting the act of adultery.
Okay, this complain I hear from many guys but I always say this: If you are strong in Imaan, no girl is supposed to have the power to dazzle you. The more you ignore the face of a female and reject them, the more your Tawqa is polished. So it is needless to complain about women of this age. They are just showing themselves, you just ignore all their invitations!
I do that all the time so girls always criticize me. LOL. I then refer to the story of Yusuf (AS) and mention this dua to them:
Dua of Prophet Yusuf (peace be upon him) to protect oneself from the fitnah of women:
''My Lord! and if Thou turn not away their device from me, I will yearn towards them and become (one) of the ignorant''
Rabbi wailla tasrif AAannee kaydahunna asbu ilayhinna waakun mina aljahileen
Surah Yusuf ,verse 33
May Allah (swt.) guide us all! Ameen