Genuinely need tips on how to stop procrastinating because I'm just destroying my future at this point

No really I don't think I have ADHD but I avoid studying like how vampires avoid sunlight. On the rare occasion on I sit down to study, I give up whenever a hard problem comes up and sometimes read the same line five times without even knowing what it says because my mind is elsewhere. I don't have a problem in learning or understanding but it feels like my mind simply refuses to look at the textbook for more than a few minutes. Even if I put away ALL the distractions and can't access them, my mind somehow still manages to go elsewhere. What do you think I should do and what could be the cause of this?