I feel like I’m losing my mind

So I was at a party last night and I started talking to this girl and we were alone with each other for a couple hours, she was really interested in what I liked, and just a lot about me in general. She was being flirty with me, and I was trying to be flirty back which kinda worked. At one point, we got to the topic of relationship, and she asked if I was looking for a relationship, I said yes, and then a few minutes after, she proceeded to ask if she could kiss me, and I said yes. We kissed, and then we started making out for a while. But she had to leave since she had work early in the morning. We hugged and kissed for a while before she left, and I gave her my number. It’s been a while, and she hasn’t texted me or anything. Maybe I’m being too hopeful here, or maybe I’m overthinking things. Maybe she’s busy, or maybe she just isn’t as interested as I thought. Idk. I’m sad, angry, and disappointed in myself because my mind makes me think it’s my fault, and maybe it is. What do you guys think? Am I being too hopeful? Or am I just overthinking things? I feel so stupid.