Not my favorite trope, but maybe I like it more than I think. A list of ships consisting of characters who started as friends and became lovers/romantically involved (or I WISH).

• Mulder/Scully (X-Files)
• Clark/Chloe (Smallville)
• Lee-Leng/Kajika (Hanasakeru Seishounen)
• Logan/Veronica (sort of; friends to enemies to lovers)
• Mugen/Fuu, Jin/Fuu, Mugen/Fuu/Jin (Samurai Champloo)
• Draco/Theo (HP)
• Holder/Linden (The Killing)
• Caleb/Spencer (PLL)
• Carrie/Quinn (Homeland)
• Arata/Chihaya/Taichi (Chihayafuru)