Does this considered losing my virginity? Should I tell my parents?

kay so I'm 15 and curious, I went to this teen club and I should be 16 and up to go in but they believed me that I'm 16. I went to the drinks section and this biual girl just started a conversation with me. She's like 18. She asked me to dance and we danced and we just both started grinding and begin touchin' and flirting with each other a lot. At first, all i wanted was just be friends with her because she's so friendly and really pretty. then we sat on this table near the corner where we both can hear each other and we just started talking again and I begin to like her a bit. She suddenly asked me if I'm curious and I said yes and we just started kissing. After that, she asked me to go home with her but at first I was doubtful cuz I just met her and it's getting really late but then she mentioned her gossip girl novel collections and that she will let me borrow so I went for it.. She took me to her house and then her room. We just started kissing again and we had . you guys know what could happen. the thing is I'm so confused if I lost it or not cuz all we did was just eat each other up and there were no . so did I lose it or not.. and please don't call me a slut. I'm just a girl who's super curious. Should I even tell my parents about this. Will they freak out?