My daughter has some friends to play with after school, most of them are our neighbors.
Sometimes our friends' families visit us on weekend. Sometimes her classmates in her daycare come with their parents. Kids play in the backyard, we just chat with each other. My backyard looks like a playground, always noisy in summer evening until 9:00pm. The headache is kids always fight for the toys.
You and your daughter can try to make friends in park and library after school. Summer is a good season for kids to make friends, Because most of time, we play outside instead of staying at home.