Love 'em and leave 'em American phrase informal
"Em" is used as a short form of ‘them’, so it can also be phrased as "love them and leave them".
To seduce and make someone think you're in love with them (the fact is that you're not) then leave them
She seems like a nice girl, I think she's not the love 'em and leave 'em type of girl.
He's not serious with you, girl. He is the love- them-and-leave-them type.
To flee or run
I'm leaving
1. Used when someone or something moves very quickly.
2. Used when one starts moving or leaves promptly.
To abandon someone you was going to marry at the wedding ceremony just before it is supposed to happen
To leave at a favorable moment
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.