This is so the textbook case of first relationship. Couple finds each other, fall in love, and go entirely overboard in that respect. No experience to know that you both have to keep separate lives or else either of you will never be happy. Sounds like a friend of mine. Spends all day every day with his girl, and never ever does anything else. Hell, he's not "allowed" to, because to her, if he was to hang out with anyone but her, it would mean that they have lost love for each other. Its sick really.
From the sounds of it, you lived together, had joint bank accounts, did EVERYTHING together. Thats usually only really what one of the people in a relationship want before marraige, and it looks like you were that one. Stuff like dropping L-bombs 12 times a day only makes me more sure that this is exactly the case. When that original burst of love slowly fades, it gets much harder to want to be 24/7 with someone, and there is NOTHING wrong with that. The only problem is, neither one will act on that because they dont want to scare the other one.
If youre as bad as my friend is, and dont have any other friends anymore, I'm happy for you right now. You might not realize it, but this is for the better. If you were still normally functioning, well then, that sucks.
Either way youll be fine in the end, and a couple of blunts here or there will help you through it.