There’s nothing wrong with what you’re doing, but there’s also nothing wrong with a person not wanting to date someone who is dating multiple people. For some it can feel like putting time into someone who isn’t as serious as they are, and that’s okay. Some people are out off by the idea of a person having multiple partners because it opens them up to emotional turmoil and potentially disease if someone is sleeping with multiple people. For some relationships are special. Not so for others.