I told you men were genetically broken!
I know that you're hurting--it's inevitable in any relationship that you're going to get hurt. Even your family hurts you.Â
What's important is that you're strong enough to move THRU the pain and into your life.Â
I've been here before. I've had two really serious relationships, and both of them 'broke up' because each of the guys thought that more 'space' was needed before committing.  So I cried, but said, Okay. Have some space. I'll have some, too. I still love you very much, but let's see where we end up. (Oh, but take your pajamas home with you, and also your hunting gear. I can use the space on the porch for this other thing...no, there are no benefits anymore, dearest.)
Both of these men are still among my best friends. I was at both their weddings--was invited to BE in one of them, but thought that was weird--and their wives are dear friends of mine now, too.  I love all of them; but if I'd gotten all heartbroken and mad, I'd have been out 4 people in my life (well, really 9, counting their kids I'm auntie to!) that have brought me love and joy and happiness.
Here's the one thing I know, and I know you know this too, so just keep reminding yourself of it.  Your life is YOUR LIFE, no matter who you are or aren't sharing a house or a bed or your dogs with. You're responsible for how you choose to behave in this life.  Those choices will hurt sometimes, but they're each individual soul's to make, and nobody else gets a say--even if you ask advice, the final choices are all you.
Now, I myself often choose to be mean and nasty, and to call people evil names and judge them, because I'm basically an evil b**ch. But I have also chosen on occasion to forgive and love and share--sometimes, I do choose that. These choices are entirely up to me, 'cause it's MY life.  All mine.
So--choose your life, sweetie.
Decide what the right parameters are, if any, that Matt gets to have in your life for now, and just live your life by those choices. It won't be painless, and it might not even seem like what you want. But if you stick to your guns, however it plays out, you'll have your self-respect, and I can't think of anything that's worth more. And I'll bet you'll also end up with a friend who respects you more than he does right now.Â
Cause that "too fast" thing? Is all about the disrespect. (I told you I was judgmental.)
Go to the dog park, and find yourself a cute guy with a cuter dog and choose to have some new friends, too. You deserve to have a LOT of friends in your life, and this is your chance to go find some new ones, without having to drag him along with you. This Mattlessness could be a LOT of fun, if that's what you choose. Â