I'm a straight A student all my life, 7 A 3Bs in OL, most of the time among first few in the class, 3 As in AL, first class honors in University, good rank in post graduate exams, still I struggle with stress and internet waste my time. So don't worry you're not the only one to struggle.
But read these books and set your mind and finish AL if you want to survive. No option.
Habai ammala thaththalage salli kaala naasthi karala wade karanna ba, saapa wenawa.
Quit social media, stop using computer, meet a good mentoring teacher, be only with determined friends and work hard.
I'm going to do the same after this comment.
Thank you for your post.