Last Christmas is quirkily British chick flick, I am a huge George fan and so initially watched it for that but really enjoyed it, especially the relationship between her and her boss
The proposal is an excellent suggestion I love that film Betty white as ever is awesome in it!
Does it have to be a "rom com" cos if not I highly recommend "bad moms" and "a bad moms Christmas" you can even play "spot the mn relationship stereotype" bingo!
Ryan Reynolds before he was too good for romantic films
I don't think he thinks himself too good for them he's just not generally thought of as a romantic lead (unfortunately) deadpool at least the first one is very much romantic.
Life as we know it - sweet little film albeit formulaic in some parts. I love the social worker in it she's hilarious and anything with Melissa McCarthy is usually a good laugh (although I didn't like bridesmaids)
I have a real soft spot for First Wives Club
Me too! Loved it when it first came out but enjoy it on a whole other level since I became a 1st wife!
Practical magic is another
@Jackabobbo - pitch perfect films - they're ace! I've watched them so often I know all their arrangements of the songs better than the originals and wrong foot myself when trying to sing along to the originals when they come on the radio 
What to expect when you're expecting is another go to of mine, though I tend to skip forward a certain part as too hard for me to watch.
I LOVE Anna Kendrick total not a chick flick but if you can also try the accountant she's not in it a lot but it's a sneaky surprise of a film.