I already know your first thought… Brittany (your girlfriend) is going to kill you! Probably true but I did it anyways. Over the past month, I kept track of every direct cost of having a girlfriend.

May 1: Britt bought ice cream for me. Cost: $3.5. Running total: -$3.50 (dollars to have a girlfriend each month).
May 4: Britt bought me an expensive cocktail at Calavera. Cost: $10. Running total: -$13.50.
May 8: I bought ice cream. Cost: $3.50. Running total: -$10.
May $19: I bought a round of drinks at Top O.  Cost: $6. Running total: -$4.
May 20: Erin (my sister) gave me tickets to a Brad Paisely concert. Cost: free! We went to dinner beforehand at the Loop. Cost: $9.50. Running total: $5.50.
May 23: Dinner at Imbibe, I had a gift card so it was basically free. Don’t go here for food though… 1 star.
May 31: So this one’s on me. I really wanted to go to a Green Day concert and I think the only way I could convince anyone to go with me was if I buy a ticket for Britt. Cost: $65. Running total: $70.50.

This isn’t a perfect sample size but here’s the verdict; $70.50 per month to have a girlfriend (which I think is actually one of the lightest months to date). In other words, $846 per year or $56,682 per lifetime but who’s counting.