Just wait a while and don't feel alone. I was thinking of an ex and the memory almost had me crying at work on Friday. I'm fine now and realize it was all me. Not her, not the world, just me fixating. If the woman your dating sucks then jump ship, if it's bad now it can only get worse since the beginning is the most intensely joyful part and if that sucks or is setting off alarms then she's shit for you and just go on without her. Don't debase her if others ask just say you wanted someone that was this type of person/thinker instead and it just didn't work out.