Frustrating Valentines Day Outfits

After booking a table at a lovely restaurant, I've been dying to find a cute dress...

I very rarely wear dresses but I thought I'd try and make an effort for Valentines day and Tom's said he hasn't seen me in a dress yet! I saw this dress above on Lauren Conrad's website but it's £105.68. I melted a bit inside as I knew this was perfect.

Even after looking online at Topshop, I'm still disappointed with what I found.

The search goes on! Looking for a cute dress like the first one, priced below £40.

Can anyone help me out?!