I'm in such a relationship. Sometimes it saddens me; sometimes I think of it as an opportunity to do my own thing without judgement. I have my reasons for staying-I have a dd still at school, for example. That makes life difficult; when she flies, the situation will be much different, as I'm not married and I therefore have no entitlement to stay in the house (his house).
I could go. We've grown apart. He's been unfaithful. I'm not ready to forgive, and he hasn't asked for it.
He used to be my soulmate.
. I don't mean that in a cheesy sense, but we used to do everything together; shop, travel, spend time. No more.