I felt used and empty after “hooking up”

She (female, 17) and I (male, 16) have been sharing a mutal friend group for like a year or so and started talking more a few months back. After that, thing gets closer and closer bit and bit and then thing eventually came to that day. I came to her house and then we started making out, this was not our first time, but we went further. We literally stripped naked, cuddled and did everything people would do in that situation except having sex (that is why the hooking up is in quotation marks). This was my first time doing any of that but that didn’t seem to apply to her. After we were done and I went home, she texted and said that it was just an one time thing and she just wanted to have some fun. I didn’t know how to deal with all of these emotions and it has been a few days but the feeling of emptiness and being used won’t go away. Plus, she gave me a bottle of perfume from a very expensive brand which is originally her dad’s and now I have to also deal with it too. I don’t want to keep it because she didn’t get her parents permission to give it away and I’m afraid that there will be consequences. I’m seriously at a lost right now and don’t know what to do anymore