I found a tiny cat

I found this little kitten in a gas station parking lot off the highway. She acted feral when i first picked her up and i didnt see a mother or siblings around. We cant take in any more animals, but i didnt want her getting ran over or dying in the heat. She will use a litter box, seems very healthy, and is friendly. She seems to be totally fine with other animals she doesnt react in any negative way to ours. Im assuming shes about 6 weeks old. I included a picture of what her breed looks like older. Message me if your interested.