Ugh.

So - you let go of the rope, did the Last Resort, and he came running back - only sort of.

It's so annoying how, once you finally let go, they finally stop to think "wth am I doing?"

Still - it's okay at this point to think about what YOU need. Do you really want a future, making babies and raising a family, with this guy? What would it take for you to feel truly comfortable that he was a safe bet?

The temptation is to just jump back in once he starts to make moves towards you - which he probably will, once the affair "drugs" wear off. But think very carefully about what you would require from him. Don't settle for less than you deserve.