I know these situations are always difficult, especially if you have issues with abandonment. But I would be asking myself if this wasn't a blessing in disguise. You said that you split up because he wasn't working on himself, which was a good, healthy decision on your part, btw - and now you're faced with a situation in which he either hasn't done that work, or he may have done a narcissistic discard, or he may have moved on to someone else, or he may have decided he shouldn't be involved with anyone right now. In any case, do you think you need to be involved with someone that doesn't respect you and value you enough to tell you what's going on? Rejection can be painful, but... that's honestly exactly why he's probably not healthy for you. You are trying to establish stable, healthy relationships. Healthy friends and partners communicate why they're not talking to someone; they don't just fall off the face of the earth. Even if you were to get him back, it's now created a situation in which you cannot trust him to not ghost on you. And considering your diagnosis... that's really the last kind of relationship you need, friends or otherwise. Hang in there! Just focus on you right now - you have been hurt, and you need some TLC from yourself now to heal and feel better. You WILL find someone that doesn't act this unpredictably in the future if you just focus on taking care of your needs first so you can be the kind of person that can maintain such a relationship when it comes your way. Right now, just try to remind yourself that this is okay... it's normal... and your feelings are normal considering the way in which you were dumped. But what is NOT okay is that he didn't tell you why he was no longer to speak to you, and that quite simply should not be tolerated, and definitely should not be allowed to cause you to develop all this stress and worry, trying to figure out how to "fix" it. You can't fix it. You can only pick yourself up, dust off, and keep moving forward and trying to find someone that better reflects the values and boundaries you're trying to establish in your relationships.