I made out with my friends Girlfriend what should I do?

My friend Jakes Girlfriend Veronica has been staying at my house for the past few days cuz shes mad at her dad and my parents are gone for a few weeks. A couple days ago we were hanging out outside in my pool and we just started talking about some **** and it comes up that she likes me so i tell her i like her too end of conversation. like a day after, were talking and hanging out again somewhere in our conversation the mood flips and we start making out for like 5-7 min she kinda starts undoing my pants I start grabbing for places and Jake calls everything stops we get away from each other. I do not know what the hell i should do. should I tell Jake, should I forget it ever happened