にはまって

be hooked on; fall into

→ に
phrase Rare #26,705
be hooked on; fall into Used with に to describe being absorbed in or addicted to something, as in a hobby or food, or falling into a trap. The polite written form is はまっている; はまる is often written in katakana as ハマる in casual contexts.
JA: 最近、私は日本の歴史にはまっている。
EN: Recently, I've been hooked on Japanese history.

一時期コーラにはまって毎日のように飲んでた

For a while, I was hooked on cola and drank it almost every day.

リヴカ言語にはまっている

Rivka is obsessed with languages.

子どもの頃私は推理小説にはまっていた

When I was a child, I was hooked on mystery novels.