Not necessarily. While it is possible that many of the stars we see in the night sky have their own solar systems, it is not true for all of them.
Stars are born from collapsing clouds of gas and dust, and during this process, they often form a disk of material around them called a protoplanetary disk. This disk can give rise to the formation of planets and other celestial bodies. Therefore, it is reasonable to assume that many stars may have planetary systems similar to our own solar system.
However, not all stars go through this process of forming planets. Some stars are solitary, without any planets orbiting them. Others may have planets, but their systems could be different from our solar system. There is a wide diversity of planetary systems, including binary star systems where two stars orbit each other while planets may orbit one or both of the stars.
Determining whether a star has its own solar system often requires sophisticated observation techniques such as the transit method or direct imaging to detect planets around other stars. Scientists are actively studying exoplanets (planets outside our solar system) to better understand their frequency and characteristics, which will help refine our understanding of how common planetary systems are in the universe.