Although I have been used in the past, this was not one of those instances. I didn't wine and dine her while in Germany (maybe that was bad). We just got together and spent 3 days together, visited her family, met her parents, etc. I mean, she has said herself, that if 6000 miles didn't separate us, there's a good chance we'd be together. You never know what the future will bring.
Here are some more thoughts on happiness:
Solving a complex problem in Calc.
Completeing a CS program and having it compile correctly.
Drinking too much in the company of friends.
Giving time and money to those who really need it.
Etc, etc, etc