Subway sequence is a great romantic moment.
Maybe you have to be a New Yorker to appreciate this but...
I think the entire scene where she runs after him on Central Park South, throws her shoes off, runs even faster and catches up with him on the crowded subway platform is one of the great love scenes in movies. When they play "telephone" shout to convey their feelings through the two guys in the crowd it's just a wonderfully funny and romantic moment. It always puts a big grin on my face when I see it. Then when he walks on top of the crowd to get to her and then that kiss...well...it's very satisfying. Well done!