Should I stay or go

What's wrong with me. All the relationships I've had (including current) I go funny at the 3 year mark. It's like I just find any and every excuse to say hey this person isn't right for me and I nit pick at them yet stay until about the 5 year mark.
But I really feel like my arguments are valid!
With my supposed boyfriend now (I say that because we broke up a few days ago, still in the same bed but the awkward silence and snappy periods), we argue about money, I feel like he wants a free ride. He pays bare minimum to the household and refuses to pay extra for half the bills that occur outside of his weekly payment. Which by the way is half rent half internet and 50 a fortnight for power.
On top of that, he spends most of his waking hour at the pub and comes home has dinner then passes out.
However he does work really hard and really long hours but I feel like I'm just here for him to have his cake and eat it too.
He says how much he loves me and I actually believe it most of the time..
When he's sober he's cranky and vacant. If he washes the dishes the once every 2 months he does it's a song and dance every time. When he's had a few he's happy and lovey dovey.
We don't do anything together because I don't get to see him.
Should I just get over it and accept this is probably ok and is normal in a relationship that your put up with?
I think also I just feel guilty and bad that he just isn't getting what's making me upset and well let's face it, he is male. I also feel like I'm acting like a spoilt brat, but am i?
his values are the same as mine and I've never had that. He doesn't look at other women, it's like I'm his world. Except for what I said above. I feel sad but so angry at the same time, I'm so confused :(