<human>: I'll make this brief.

I've been in an polyamorous relationship with A for approximately 3 years.

D was a mutual friend of ours, and D and I dated for a year. Couldn't have been happier. Love all round.  Then D decides he can't stand A, and breaks up with me because of it. Ouch.

D then tells me I'd have to beg and crawl to get him back, dump A and agree to be his slave and not question anything he says (I'm in a power dynamic with A, but we worked to get there for over a year)
This is obviously unacceptable, and I tell him so. D moves to a different state to run away from me.

Months later, I run into him at a convention. He plays the 'you don't exist game' in front of mutual friends. I'm obviously, visibly hurt by the treatment. 

He breaks his silence that night to yell at me via text that I roped our friends into defending me (which...no. Apparently the friends in question chewed him out of their own accord).

After lashing out, calling me a victim, accusing me of awful things, and saying he hopes I'm 'happy in my choice', D flounces.

I write D explaining that I didn't mean to rope anyone into defending me, and that I was hurt by his behavior, but that I still cared for him and hoped he was happy. He replied that he still loves me. (When he broke up with me, he basically shut off his emotions Spock-style and claimed he didn't know if he loved me or not but that it was irrelevant.)

I'm baffled by this hot/cold behavior. I don't hear from him for months, then he's hostile, then he tells me he still loves me?
Not sure what he was trying to accomplish. Can anyone shed some light?  Was he simply trying to hurt me/get the last word in? Happy to provide more details if necessary.

Give me a shortened version of the text
<bot>: Ex runs hot and cold, attacking and accusing me of being a victim and a martyr, then saying he still loves me when not pretending I don't exist.  Is he crazy or is this 'normal' ex behavior? Help.