is when two friends who have feelings for one another come to an agreement that they are trying to become a couple or attempt the "boyfriend/girlfriend" status. It involves spending a little bit more time with the person as well as cuddling. Actions between the two should not change drasticly but a tiny bit, to at least show you have an interest in the other; such as
hookups every now and then, or kissing
on the lips for goodbyes and
hellos, kisses on the cheek are cute, but its time to bring it to the next level when you are together.