Why don’t I feel drunk even if other people say I’m acting drunk?

Hi all! I’m 21F 120lbs 5’3, and every time I’ve been drinking lately, I haven’t felt drunk or tipsy whatsoever. Or, I’ll feel vaguely tipsy after 3-4 shots (which used to put me on my ass). I’m not a super frequent drinker (1-2x/week). However, my partner tells me that I seem tipsy, even if I don’t feel it. Why don’t I feel drunk even if other people say I’m acting drunk?

TLDR: I don’t feel drunk after 3-4 shots, but I seem outwardly drunk.