Tough one...
If has been a while since the last romantic dinner then you should choose the romantic. I can't explain very well. It depends on the relationship.
Your friends will understand if you give a higher priority to your gf/bf
Dinner at a restaurant or dinner at home with candle lights?
Mmm dinner at home with candle lights- I've always wanted one of them...maybe some soft music...a little wine...maybe champagne....maybe a little fireplace to watch...or a comfy seat in front of a window to watch the stars... I could go on about this for a while....