I don't mean to butt in, but I think the best thing you can do for DIO is give her (and company) some space. It may seem disingenuous for you and them to argue, for you to show confusion, even ignorance about her confusion, then come back shortly after, apologizing profusely. Like an apology video on youtube. You say you are taking steps to fix your relationship, and personally, I believe you are, but it is a bit to early for real healing. Or too late. You and DIO argued even before she came out as having DID. You had been in some sort of relationship, and after that ended, your clinginess caused her to have to block you, for her own mental health. If you would like to repair with her, you will have to 1) give her space. This will help you as well, as DIO seems to have become a bit of an obsession of yours, to an unhealthy amount, 2) Think of her as a multiple. I use she/her pronouns when describing DIO, only because I am talking about the host, aka who you talked to before she came out as having DID.