It probably won't help that seeing double/triple problem if Steve runs into Tommy before this is out of his system. But for now Billy flushes a little. It's not his first interaction with a version of the Captain, but it's definitely the first time he's ever seen him in such a vulnerable state. Hell, he didn't even know Cap could get drunk. Which means this stuff has to be pretty strong.

He flashes a reassuring smile, giving a small laugh at the offered hand and taking a half step back so he can take it and give a small shake.

"S'all right, don't worry about it. I don't think I'm from your reality. I'm uh... Billy. Can I- get you some water or something?"