This relationship stuff is a mutherf.cker

My mind is stuck. Stuck on one piece of information, analyzing it from all the angles possible. When did I turn into this obsessive irrational person? I myself do not know the exact point, but I guess it has a lot to do with certain someone. And now I am not sure what way to react. The worst thing is that I do not know what would be rational and what irrational anymore. Is it rational to run or is it just a way to let the fear inside me show itself. Is it irrational to stay once you know sthg or would it be totally rational to stay because in reality feelings and experiences have not changed? Are we who we were and what we did in the past or are we just who we are now? Dammit