pop the question

Very early on Sunday morning I was lying on my bed, texting a few friends, watching some youtube videos, la la la. My ex boyfriend was texting me a bit. Just to include the back story, we got together in fresher's week in my first, and his third year of uni. We lasted about 4 months, until he finished me. And that was about 18 months ago. Because he was at work (he's on nights right now) and was trying to get stuff done, he called me for a bit, instead of texting.
Chat chat chat, very nice. Then he says 'Can I tell you something?' This sort of sentence is the kind that fills me with dread. 'Yeah, course' is what I answer, but I'm already anxious about what's coming.
'You know we were planning that holiday?' He's referring to a pie-in-the-sky flight of fancy we had to go away together in June. It never materialised.
'Yeah'.
'Well, while we were there, I was planning to propose.'
'................................................propose..........marriage?'
'Yeah.'
'..........................Okay.......................'
I know. And, maybe you think this sounds strange and unexpected because you don't know the details. If you think that, you're wrong. This is exactly as strange and unexpected as it sounds. I was, quite literally, speechless.
He proceeded to tell me about how he'd picked out, with the help of a friend, and bought, a ring, and that he'd planned what to say, and where to do it. He also told me that he thought I'd probably say no, but that, in any case, he wanted me to know how much he cares for me.
This is a guy, who said he could never marry, because marriage is a sacred covenant between the couple and God, and he could never trust another person not to break the promise they'd both made to Him. This is a guy who finished with me because he said we wanted different things and therefore we had no future. A guy who slept with, and went out with someone else, barely weeks after we broke up.
Needless to say, I am still recovering from this news.... I think the only way I can come to terms with this is to compulsively ebay.