I wanted to get some advice from the community. One of my best friend's dad works for Delta Airlines, so he can get dirt cheap airfare. He wants to go to Amsterdam with me next August for a few days and I really want to go on the trip as well. The problem is, it would be without my girlfriend who by that time, we will have been dating for 1 year, 3 months. I'm graduating college this year, and our relationship is pretty serious and long term.
When I introduced the idea of my trip she got very upset and really doesn't want me to go. She's mainly worried about women hitting on me while I'm gone. What can I do to gain her trust over the next 4 months so that she'll be fine with the trip?