So, I don't really know now how to cope with these feelings that keep popping up. I've become addicted for that reason (dissociative-identity/topic106765.html) (at least, that's the main reason). Now, it seems this forum has (temporarily) become a different way of hiding feelings. Which is a bit better, but still not really right.
The feelings are possibly caused by past trauma/memories, but I'm not yet sure whether it are memories.
I've found one way that can really help: music. Music helps me stabilize (even before I knew there were these feelings). Sometimes, I just ask everyone to insert the songs they want (by generally not allowing more than one song of each album after each other). This can lead to quite strange playlists (first pop, then heavy/black metal anyone?). This seems to help more sometimes.
So, my question really is, are there any other (more safe/productive) ways to cope with these feelings? It aren't really flashbacks most of the times (although, sometimes, suddenly I get 'caught up' or something in it). It is just that continuous hiding of those feelings. I've always kept myself busy with something, or forcefully thought about my addiction (which was always to hide things, I think). And whenever I'm not busy, often I just space out (I think) / numb out.