to get the romance scene at the party, you must be on good ROMANTIC terms with your partner. your approval rating doesn't mean squat, it is not directly tied to the progression of your romance. you split your time between partners, and did not hit the right notes during your private time with Gale. that will skew your romance rating. same thing happened to me with shadowheart. you need to focus specifically on the partner you want, right out of the gate, or it slows everything WAYYYY down. You can probably fix it by act 3 if you keep saying/doing the right things, but it you want to make sure, go grab Cheat Engine and load up the latest table, and scroll through the options until you get to companions, then follow the instructions you see there on the first line for that section in the table. max out your romance stat with that person, then do a long sleep and everything will be fixed.