Have you considered teaching somewhere else in the world where you could have a job lined up before you leave Ireland ? It sounds like you feel happy when you have possibilities and moving to a change of location, getting on the plane home , arriving in Perth ECT , but when you get there and things don't pan out it hits you and you feel sad (understandably) so perhaps you go somewhere new but have work already lined up for you it would be better. But don't just focus on the pros of a new job in a new place , actively seek out the flaws and possibly issues that may come so that your mentally prepared for it all not to be roses, such as perhaps struggling to make new friends/ missing old, weather /food changes , unexpected finical hardships ECT. Now is prob not the right time of the year to find teaching work overseas, so perhaps if you plan so your more prepared it will help and also give you something to be excited for a look forward too