Non-PRO Japanese to English Art/Literary Poetry & Literature

I've been looking up and down in both English-Japanese and Japanese dictionaries and they all provide me with the bog standard explanations whereby つい　is always used before a verb or verb phrase to indicate performing an action accidentally or recently/just now. Yet here I have it at the end of a sentence, and I really don't know how to interpret this. A girl is speaking to her guidance counselor. The text is a manga, and I've kept the spaces and punctuation as is.

Baloon 1: ．．．それで　付き合ってた男の子がいたんですが　Balloon ２: 触られて気持ちいい　．．．というか　その緊張もしてて　彼の指で　わけ分からなくなってつい　Balloon ３: こないだ初めてした．．．時に．．．気まずくなって