Just need to rant!

So my fiancé decided to leave me today. Well he said he needed space to decide if he wants a relationship or not, because he would be happy to sit with his friends everyday and doesn't know where I fit in to this. I'm four and a half months pregnant like how dare he! I'm so angry to the point I have no idea what to do or how to cope with the rest of my day! He wants me to just sit and wait for him to make up his mind I'm not a door mat! I'm not sure if anyone will read this but if you gave any advice I'd appreciate it!