How to Fix my dilemma?

This morning I starting talking to my girlfriend of 2 years and stated to her that I feel as if I should date more people as I never really dated anyone and go from relationship to relationship. The reason I told her this was I went out with one my friends (girl) from school (strictly platonic, not a date) to Disneyland and started to have feelings (erflies) which I had not gotten in a long time. Now I am regretting my decision and don't know what to do as I love my girlfriend so much and want to still be with her (we broke up)... I wanna call my girlfriend but she just says that I would not have brought it up unless it was a big deal.