“Thank you,” you say, giving a genuine smile. At the offered alcohol, you nod and take a (fake) swig. “Mind if I hang onto this? I kinda need it.” With that, you start walking back to your apartment.
You know he didn’t really drink it. You know it but it makes you feel a little better to pretend you’re having fun so you laugh and act like you have no idea, leaning on him for balance as you wobble your way alongside him. More than a couple times you almost walk into the street at a red light, but other than that you’re cheery and chatty about all the attractive and funny and interesting people you met.