Give yourself some time. You are going through a phase, and I would advise that you not take any action until you are past the anger. We all make mistakes, and your H made a doozy of a mistake, and it is unacceptable what he did, but you will need to forgive him whether you stay or not. For your own sake, more than for his sake. Do not burden yourself with this anger for too long - it's just not worth it. I have seen what it can do to a person - a friend of mine is still angry 10 years after the A - still married to her H, but she has allowed the anger to fester, and it changed who she was. Not a pretty sight to see, and very sad. I know someone else who divorced her H because of an A, and is still angry with him, years later, and it has affected the whole family. They have to find ways to have both at functions, but at different times - it's absolutely ridiculous. So! Try not to stay angry, but understand it is perfectly normal to feel it.
Ultimately, the choice is yours, but be sure it is really what you want. It sounds like your H is a good man who made a stupid mistake. I wouldn't normally advocate for a cheater, but I just get that impression about your H.
And when I say you are 'lucky' he is remorseful, then I mean that many of the WAS's on this site never get to that point of feeling any remorse for what they've done to their spouses. Does that mean what your H did is okay? Heck NO!
Hope it works out for you. And please, understand that this is all just opinion based on what you have shared with us, so I hope I haven't offended you in any way. This is one place where you can know that we know how you feel.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim