I think it's time I repay him with a few lies of my own
what are you going to lie about?
I don't know yet and I'll decide along the way.
If you think he lied to you, you should talk to them about it. Lying back to him will make the situation worse.
That's only if I like them and honestly, I don't. So it's okay. Besides, exposing the information he tried to hide won't hurt him. He deserves it.
Don't you want to avoid any drama with this? Don't you think he already regrets what he has done, so don't you think it would be better to just make peace and bring honesty all around? This could be the spark between you two in a friendship!