I'm looking for dramas/movies where two people are neighbors and meet up, also end up living together maybe 

like for example Flower Boy Next Door, Switch Girl!! ehh yeah that's all I can come up with  xD from any country is okay

Neighbours?
Que Sera Sera since I just finished watching it. Intense and unforgettable.
Love Shuffle and Reply 1988 fit too.

Living together, there's LOTS. From your PTW, I suggest Nodame Cantabile (more comedy & music than romance), Rooftop Prince and Smile, You.

Check out this thread..http://mydramalist.com/discussions/general-asia-forum/494-your-favourite-forced-living-situation-drama?postid=32829#p32829

Exo Next Door (even tho it's a drama with idols it's pretty cute and funny.)
also Kurosagi and Shut Up; FBB

also 2 movies;
L-DK
Do Re Mi Fa So La Ti Do