I'm going to on a date with one person, and after the date I'm planning to sleep with someone else.
That's gotta be a joke. Why would you date someone, then sleep with another?
He's actually my ex-boyfriend and I still like him.
I know you still have feelings for your ex, but sleeping with him while dating another man is wrong. Unless you have an open relationship, you should be honest with the person your dating and tell him what you're doing. It's unfair to him to cheat on him.
I never said I have an open relationship, I just wanted to get banged by my ex for my enjoyment.
I believe it's best to just call off the date with the other guy to safe face from him and future partners. You obviously still have some lingering feelings you need to sort out with your ex. How would your date feel if he saw from the get-go that you were unfaithful?