「あの時は3年間通して女の子と数えるぐらいしか喋ってなかった」は英語で次のように言えます：
• At that time, I only spoke to girls a handful of times over the course of three years.
• During those three years, I can count on one hand how many times I talked to girls.
• Back then, I barely talked to any girls during the three years.
「数えるぐらいしか喋っていない」というニュアンスを英語では “a handful of times” や “I can count on one hand” で表現できます。どちらもよく使われるフレーズで自然です！
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize
