Class AB Amplifier help
You have no voltage gain because Q1 and Q2 are emitter followers, a circuit configuration with a nominal gain of 1.  You do have current gain, however, due to the current gain of Q1 and Q2 so the overall effect is power gain.  If you need voltage gain, you can add a voltage amplifier at the input.  This could be a differential pair but you could also use an operational amplifier. You should arrange to take overall feedback from the output,however, to reduce the distortion of the power stage.