I didn't cheat on him but I was getting other male attention and realised that I was bored of being tied down. I no longer missed him when I spent time away and I always made excuses to get away from him. I was bored of the same routine.
Disclaimer: I understand not all people need attention and I've met the wrong people.
This made me think; I'm not saying that you will fall into the same category as what I'm about to say, you had your reasons and he didn't really help your relationship. However, I've found it bemusing why other relationships (including some of mine) have had people who simply can't keep themselves entertained.
By that I mean right now I am single and I am able to keep myself occupied and interested in things and have no need for other people (
like a partner) to do it for me/plan it for me/entertain me directly.
Likewise I'd like to assume that some of my previous partners, or friends of partners were able to keep themselves busy. I had girlfriends who had a life before me.
But suddenly, oh, now that they've met me they seem to lose all interest in these hobbies whilst I don't in mine. Whilst I may be the most amazing thing that happened to them since 5 minutes ago, this wears thin for both them and me.
I cannot continue to entertain these people indefinately because everything that's good enough costs and the things that grow old are free, sex falls in to both categories!
I start missing my free time being able to game in the games that take time(hours), or just wanting to lounge around. sleep, sometimes I have medically related issue that make me so damned tired, a week might go by where I don't have anything new or fun.
Then what happens? Despite me ending every single one of my relationships myself, during some of them they have whined "nothing is happening, I'm bored" etc etc, as if they were no longer able to entertain themselves or have lost all ability, or lied that they could and cannot live life outside a relationship.
I hear it all the time, "Oh I left him/her because things became stale".
The above is what I think after hearing it, sure even I'm not invulnerable to getting bored but for the love of god, wake up people.
You have your own things, then you have each other, I can't see it being any different with someone else, sure he/she took you on holiday for a week and has kept you entertained for months in this new relationship, but everything becomes a boring regimen. Although, having a partner that won't ever do anything when asked and simply ignores you is another thing and totally understand.
I make it a point to make sure future girlfriends (hah, yeah right) aren't inept at keeping themselves busy without me, or even around me.
But then again there's not much benefit I see in having a partner these days personally.