[Miki]

I am a girl , I'm 13, About a year and a half ago my best friend moved away with her family, we had been friends since we were like 4 or 5, although they didn't move that far we lost contact a bit, only keeping up online.
We arranged online to meet at a town sort of half way between us my dad drove e there, and we had arranged to go swimming. We had a really fantastic time, having not seen each other in ages we were i guess being very silly and girly, really excitable. i invited her to come and stay with me for a week in school holidays.
We did some shopping had coffee etc, then went to the swimming pool, we went into cubicles and got changed, then had a brilliant time, although it was school holiday so really really busy, we were just being silly having fun etc, we went to get changed, we got our clothes from the lockers, but the cubicles were all busy, we waited and one became free, so we both went in there.
Its kinda where things changed we were still being like excited and girly and stuff happened. I don't think either of us are gay or i didn't but some serious stuff happened, we both did it , it wasn't just one of us, which I don't think i should type here, though i guess I will if I have to.
We haven't messaged each other since but she is due to come and stay in July, i'm so confused I don't know what to do or say to her. Please help.