2 sentences for 留恋 (liú​liàn)

1. 他非常留恋在大学里度过的美好时光。

   tā fēi​cháng liú​liàn zài dà​xué lǐ dù​guò de měi​hǎo shí​guāng.

   He is very nostalgic for the wonderful times spent in university.

   Source: Dong Chinese Dictionary

2. 临走前，他最后看了一眼这间屋子，心中满是留恋。

   lín​zǒu qián, tā zuì​hòu kàn le yī yǎn zhè jiān wū​zi, xīn​zhōng mǎn shì liú​liàn.

   Before leaving, he took one last look at the room, his heart full of reluctance to part.

   Source: Dong Chinese Dictionary