Geht wohl nur mit einer Umschreibung: Verliebtheit durch den engen Kontakt bei der Arbeit / im Kurs / in der Schule usw.

Jahre nach der ursprünglichen Anfrage von 2007 und in Ermangelung des bereits in #1 erbetenen Kontexts, zur Erläuterung (Stand heute) :

https://www.quora.com/What-is-proximity-infat...

 ... Proximity infatuation, also known as "the proximity effect," is a phenomenon where people tend to develop feelings of attraction or affection towards those they spend a lot of time around. This can happen in a variety of contexts, such as in the workplace, in school, or in a shared living situation.In some cases, proximity infatuation can lead to positive relationships and even romantic partnerships. However, it can also lead to disappointment or heartbreak if the feelings are not mutual. It's important to be aware of this phenomenon and to take time to consider your feelings and the feelings of the other person before acting on them. In terms of whether it's good or bad, it depends on the context and the individual's perception of it. ...

My audacious attempt at coining a meaningful new German metaphor with love.

🤔 Stockholm-Syndrom?   (Meme auf reddit.com)

*duckundweg*