In the context of relationships, mixed signals are when a person is expressing interest in someone while also simultaneously expressing a lack of interest or a desire to keep their distance, causing confusion for the other person.

Why am I getting mixed signals from my boyfriend?

Mixed signals can simply be a miscommunication—or they can be an excuse to hold you at arms length because they dont want to commit (or make you believe that they are ready to). Mixed signals can definitely mean that the other person isnt going all in on you, but thats not the only answer at play.