The verse is a guy asking his woman why they're not having sex, and asking whether it's because she's found another guy.
The first chorus is about them going for what he thinks is a romantic evening, but getting drunk at the end of the night and eventually fighting over his jealousy.
The second chorus is about him being so engrossed by his jealousy that it takes him over. He's asking her whether, if she found out he thinks she's cheating, whether she could forgive him. Then he leaves her, even though she has done nothing wrong and he's just made it all up in his mind. And he realises his mistake, in the last line of the song.
The verse is a guy asking his woman why they're not having sex, and asking whether it's because she's found another guy.
The first chorus is about them going for what he thinks is a romantic evening, but getting drunk at the end of the night and eventually fighting over his jealousy.
The second chorus is about him being so engrossed by his jealousy that it takes him over. He's asking her whether, if she found out he thinks she's cheating, whether she could forgive him. Then he leaves her, even though she has done nothing wrong and he's just made it all up in his mind. And he realises his mistake, in the last line of the song.