@BlueButterfly, I think most runners, well mine anyway, don’t have a name for what they’re experiencing. When speaking with my Twin the last time we were face to face, he experiences the same kind of sign and synchronicities as I do but in his own unique way. He has also tried to move on and forget me, but has unable to. He also shared with me that he’s in therapy and is on anti-depressants. I think the one thing chasers have in our favour is that we are awakened and we know what we’re experiencing and how to deal with it be it with meditation, journalling etc. But for runners, it must feel like they’re losing their minds and they have no idea what to do to fix how they are feeling. And unfortunately, until they awaken, they probably won’t be able to do the inner work they need to do to get to where they need to be. It’s a process. But I do believe they will eventually get there
Oh my gosh, Yes! This!! We have traded back and forth, runner for chaser for over 30 yrs! With my current situation were he is the runner. Both are equally brutal, actually chasing is harder. 
It feels like you are living in a dream, detached just a bit from real life, every thought is him…quieting the obsession is hard with a capital “H”!
Also a DM woman “runner” here! I really do feel for the chasers. For me, as a “runner” I am keeping us in somewhat separation because I know we both still need to work out our own things (I am still in a karmic relationship). I know he would jump right into a relationship tomorrow if I said so, so I feel like I am having to be more level headed and step back. I think our dynamic is more healthy than the typical runner/chaser though, no toxicity and obviously I’m aware of the connection and what it is. Under it all I just want him to focus on himself and heal.