Lately I have had to share my phone number for different sign-ups and quick deals, but I do not always feel safe doing that. I want to keep my personal line private. Does anyone know a better solution?

I felt the same and decided to use a second line just for privacy. On https://anonymousnumber.net/ you can get an anonymous number that works for calls, SMS, and even temporary needs. It keeps your real number hidden, so your personal details stay secure. This makes communication more private and avoids the risk of exposing your main phone