What you said the other day - was that because you were drunk?
Was it because you had been drinking that you said that?
「酔ってたからあんな事いったのかな」＝ Did you say that because you were drunk? / What you said the other day - was that because you were drunk? / Was it because you had been drinking that you said that?
ボキャブラリー
say ＝ 言う
because ＝ ～のため、～の影響で
were drunk ＝ 酔っていた
イギリス 
