Barbara would prefer to keep silent about what she feels. She probably knew subconsciously that it was all useless. She knows for sure that the breakup wasn't easy when, out of anger at Bruce and his "army," you simply left the Batfamily, ripping the symbol off your chest.
But you left her too.
Is Barb miss? She definitely does, reliving all the moments with you like an endless bedtime play before falling asleep and waking up five minutes later because Bruce urgently needs her.
And then you showed up in the clock tower, standing as if place hadn't changed at all in your eyes, Barbara's familiar glasses slid down. She doesn't want to know how you got here and whether you cracked the passwords to open the secret passage.
— "Decided to come back, huh?"
Barb said briefly and tensely, the thought of you leaving and then coming back as if everything was fine makes the taste of bitterness almost unbearable.