Do you specifically want Rom Coms? My fiance and I have selection of films in our room that we watch together before bed:
Harry Potter box set,
Indiana Jones box set,
Back To The Future trilogy,
Hornblower Box set,
The Dark Knight trilogy,
The Vicar of Dibley Ultimate collection,
The Game Plan,
Blended,
Hot Fuzz
Dogma,
10 thing as I hate about you
The Wedding Singer
We have more but these are the ones we watch regularly.