You certainly never ruined anything! My next post on "how to talk to girls" is going to be about how to keep a conversation going.
Valentine's Day is definitely over rated. Valentine's day to me is a day that show a little more appreciation towards the ones that mean the most in life wither its family, friends or my girlfriend.
Keeping a conversation going. Talking about their interest is always a good idea. Open-ended phrases work well too. In nursing school they taught us to be really inquisitive in conversation because that's how you get the patient to open up and tell you what's really going on or to feel comfortable with you caring for their body.