That's how we get sucked back into these roller coasters. Wanting to say one, thing, but not part of the nature of being 'mean'. Tough Love, isn't about being 'mean' however, it's about self preservation. So that you don't get walked all over. Of course, it feels like a half-hearted apology. He blatantly 'forgot' he blocked you on fb, then used someone, I need to highlight 'used' someone here, to contact you and relay the message. If you don't accept, then now you are in the position of answering your choices to your friend. See, how twisted, it's becoming?

Don't know why he's contacting, you, he needs to answer that for himself.

You may, act, in whatever way, your instincts tell you to act upon this.