Everything you need is here.

Two things.
Firstly (and only because the situation is vacant) Man the fuck up.
Secondly (and again, only because the situation is vacant) your Mother.
Finally – and on a more serious note – you have my sympathy, I was in a marriage for a number of years and we managed to both fall out of love, no act on it and then become spiteful and resentful with each other. What problems we didn’t address became ammunition, infidelity became an issue and we were so uncomfortable with each other you could cut the atmosphere with a knife.
The reality is, you’ll move on, meet someone new, fall in love and live happily every after, but, like death, it takes a while to get there. Get yourself on holiday with your mates or spend a couple of weekends on the lash in a different city.
Things like this allow you (both) to be the person/people you want to be, not the people you were when you got together, 5 years is a long time, but you’ll be fine.
In the words of Kim Appleby, ‘Don’t Worry’

Mullered
( JeffTheDogFucker Can you dig it?, Thu 28 May 2009, 10:12, Reply)