obsessligation
You're so obsessed that it feels like your brain is being squeezed by a giant sandwich. It makes you forget everything else. You're like a person who only knows one word.
She got obsessed with her crush and forgot about her homework. Her teacher was so mad.
He got obsessed with his new phone. He even texted his mom 10 times a day.
She got obsessed with her new hairstyle. Now she won’t stop talking about it.