Romantic Restaurant in Philly Suburbs?

I am looking for a very romantic restaurant to take my boyfriend to on Valentine's day, but I want to avoid going into the city. We live in the western suburbs, so anywhere in plymouth meeting, conshohocken, chestnut hill, King of Prussia, main line area, etc would be great. BYOB is always a plus, but mostly I'm just looking for a quiet place with a romantic atmosphere and great food! Any suggestions?