在正式確立戀愛關系之前，兩人之間的交往都只能算是在培養感情。雙方都有意發展一段戀愛關系，只是時機尚未成熟，所以還得先培養感情。因為是在戀愛關系之前的階段，所以英文中用很形象的prelationship來表示這個階段。

Prelationship is a relationship between people who are not yet but could become romantically involved. The two are probably seeing each other frequently and both have the intention to develop a romantic relationship. Maybe it is just a matter of time.
Prelationship指兩人交往但還沒有到正式戀愛的階段。兩人可能經常見面約會，并且都有意發展戀愛關系?；蛟S只是時機還沒有成熟。我們可以稱之為“培養感情階段”。

這個詞是前綴pre和relationship的合成形式，表示是一段relationship開始之前的階段。類似的詞匯還有：prehistory（史前）、preschool（學前）、prepay（預付）等。

For example:

Mark and Stacy have been dating each other for three months but are still in the prelationship stage.
Mark和Stacy已經約會3個月了，但還是處在培養感情階段（沒有正式確立戀愛關系）。

（中國日報網英語點津 Helen）