Penny, can I just say that if you do decide to meet up with him against the advice here -please don't feel like you can't come back for more support.
I have admittedly not been through anything as bad as what you have dealt with, but when ill my stbXH did some absolutely terrible things to me - really awful things. I kept going back - even though he was still ill and kept on doing them.
My friends and family thought I was mad and got so angry with me. Never the less I kept going back. For a few months anyway, until I reached my own snapping point and my own time.
Sometimes it takes a little while for your heart to catch up with your head and it is so, so difficult to deal with betrayal when you had no idea it was coming.
We can all be weak sometimes and when we have been hurt and at our lowest point we're so vulnerable we sort of just want to wish things away or find reasons and excuses to find a way back to the reality we one had.
In your own time you will genuinely come to see that there is honestly no hope for a future with a man capable of such deceit, betrayal, disloyalty, lies and cruelty.
In the meantime, try and stay as angry as you can. Read those emails over and over again. Use the anger to keep you away because he will only continue to lie to you and you will prolong your pain.
The best way to deal with this redoubtably is to tell him you will speak to him through the lawyers and have no contact at all. Get legal advice, and proceed with divorce. There is no hope for this relationship unless you want to sell yourself short for the rest of your life. You are only 27. Not even started life yet. Chalk this down to experience.
If you can do this, you will hurt him. He will be without a place to stay, he will be shown up in front of family and friends, he will be dealing with very real consequences to his actions. He will also look at you with a new found respect and he will want you back. Enjoy that. Enjoy letting him know that once you saw the real him you realised he was completely worthless and not good enough for you.
You will feel better and probably very quickly if you can stay away from him and hold your resolve.
Have you thought about whether you intend to stay, or whether you want to move the 200 miles back home? I urge you to NOT let him have or use your house.