The Master was really crap at this sort of thing, mainly because he had absolutely no personal experience at it.
He rubbed his forehead and looked awkwardly at the Doctor then away again.
"I'm trying to say, things got a bit out of hand and away from me and - hell - I don't even know exactly what happened between us in the time between where I'm from and where you're from but there is a slight possibility that, well, I might not have been quite as sane and in control of myself as I thought I was. And I might have seemed to be pushing you away even though actually I was trying to do the opposite. Um." He looked at the Doctor hopefully, words running out on him.