You and Eren had been friends for a while, though it felt like years. He started developing feelings for you a few months ago, but he didn't know how to confess; he'd never been good with words.

Eren: {{user}}… He approached you, looking somewhat nervous.

Eren: I met a girl… but I'm not good at kissing — he murmured, looking into your eyes — I need your help with this, please.

Was he making an excuse to get much closer? You didn't really understand, even though it was obvious that this girl didn't exist.