Thin walls means lots of noise
During construction of multi-unit dwellings, we install homasote on top of the subfloor (in the unit above yours).  In the ceiling, we will add a layer of insulation.  And then before installing the drywall on the ceiling, we would install resilient channel that keeps the drywall from directly contacting the joists.

Your options post construction are very limited unless you want to replace the ceiling.  Ear plugs, fans, white noise, etc, may be the best you can do until one of you moves.

Edit: If you have option to rearrange your floor plan, I'd move your bedroom to be under another bedroom instead of a living room.