My Best Friend Kissed Me. How Do I React?!

Okay so we're both girls and both bisexuals. We've been really close for a little over a year. She has a boyfriend, and I'm single. We were walking down the hallway, when we had to go oppisite ways. She then put her arms on my shoulders and 発言しました "Gimme a kiss" then pecked me. After that, I 発言しました bye, and we went separate ways. But I was shocked about it. What do I do? Should I just forget it または does it mean something?