Hi Ms.B223.
Ms.B223 wrote:if I'm not mistaken, what my boyfriend knows about me, his alters don't, and vise versa
Well, that's a possibility, but it's also possible that some alters can access information that your boyfriend has. Sometimes, they share information for practical matters, like the knowledge of a language or an address, and sometimes they don't. It's also possible that they are co-conscious and thus they would see what each other is experiencing and learning. But I don't think this is the case since he didn't mention it to you, and you said he doesn't remember some things.
Ms.B223 wrote:Well, his "atler" happens to know my current address, phone, car, everything. Things I didn't have when he first "came-out" around me.
It is possible. Don't know exactly how that works, but it's possible. I was in a relationship with someone who had DID, and I remember that the one I was dating knew I use glasses, when a new alter I was just starting to know fronted he asked if I had brought my glasses 'coz we were going to an event. I was suspicious then too, 'coz he didn't know I use glasses, but I have learnt that it is possible.
Ms.B223 wrote:So, I asked his brother about it... he had no idea what I was talking about... his mom and dad had no idea what I was talking about... Yet he swears up and down that he has it.
Maybe he hasn't told his family. Has he being officially diagnosed? How does he know he has DID? Have you seen changes in him that you may perceive as him having DID, amnesia, changes of moods, changes in the way he talks, being contradictory about how he thinks, etc.?
Ms.B223 wrote:So, I'm wondering, is it possible that since he knows about them, if they can interact with eachother but only He can't remember what they remember, but they can remember what he remembers. Or if he just really believes he has it, or if he is just using it as an excuse to cheat and get away with it.
It is completely possible he can't remember what some alters remember, it's usually the case. Some alters lock the memories of the trauma so that they as a group can function on a daily basis. Thus your boyfriend will not remember the trauma. And when they are prepared to face the memories, the alters share these memories with the whole system. They may also lock personal experiences. For example, Gatsby (my guy), would lock some moments from the rest of the system, even if they were not traumatic. What I've seen is that there is no rule as what they hide, besides traumatic memories.
If he's using it as an excuse to cheat and get away with it, you'll find out. I don't think that someone who uses it that way, can hold lying for so long. Trust your instincts, and try to truly read him. Does he go to a therapist? Have you been able to talk to the other alter or to other alters more deeply? Talking to other alters helped me understand his DID. Does he communicates in any way with his other alters?
Ms.B223 wrote:Oh, one last thing, his "atler" (the only one I've met) has threatened to kill or seriously hurt me if he's ever around me when he comes out.
Why did he say that? Do you know? Does your boyfriend know that? If not, I think it is pretty important that he talks or writes to "atler" and listens to him. Does Atler feel threatened by you? If your boyfriend gives Atler the possibility to talk or write to him, he may understand why he said those things to you, and you may act accordingly. I would say don't panic, but be cautious, an alter may totally be capable of hurting others. So it's really important that he is listened to so that he can express his anger or what ever he is feeling.
If this is the first time you come across DID do your research about it, understand what it is, read stories here that resonate with you, and surf the web for some more articles and books about it.
Hope everything works out well.
Sea
PS: I was dating a guy who has DID.
Taking myself some time away from PF. Sea (Dec, 2016)