I think you are being way too hard on yourself by saying you really messed things up. I expect like nearly all of us on these boards you went into that M with the highest expectations and feeling full of love. I don't think you have messed up any more than anyone else here has. Don't beat yourself up about it.
I can't possibly answer your last question but rather I would ask do you want him back? If the answer is yes, tell me why? Why your H in particular and not another Significant Other? The reason I ask this is that from what you post I get the feeling you are not sure this was such a great R/M. If I am correct in my feeling then why do you want to be with your H? If I am wrong, (which is not unusual at all!!!!), tell me why you want to be M'd to your H . How does the continuation of the M benefit you, your daughter, and your H?
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength