Mulder and Scully (The X-Files)
Technically getting to see their full progression is a testament of the fan you might be asking, but Mulder and Scully's friendship was explored for quite some time. In fact, they might beat out all the other pairs on this list with friendship time alone.
Rebecca and Greg (Crazy Ex-Girlfriend)
Rebecca and Greg relearning each other before dating was even on the table was such a fresh take on a romance that felt really crystal clear? These two taught us how to approach a relationship in a hopeful way and even if they aren't together right now, there is always hope for a pair this cute.
Patrick and David (Schitt's Creek)
How we got so lucky with a healthy and loving relationship like Patrick and David is beyond me. They scream progression in the easiest way and getting to see them grow to where they are now is so amazing.
Tyler and Caroline (The Vampire Diaries)
Tyler and Caroline might not have been right for one another but looking back on it, the way their friendship grew to Caroline helping Tyler shift to Tyler making a move was really sweet. It was that high school kind of love that felt like it could last forever, so being involved as a viewer was like watching a romantic comedy.
Fitz and Jemma (Agents of Shield)
This angsty pair has been and will continue to go through plenty of stuff but their love for one another is so pure and kind. This is a real iconic friendship to romance switch up that we were all really lucky to witness for ourselves.
Nick and Jess (New Girl)
It took them a while but they got there, and it was so fun watching Nick and Jess take that step together.