how can u get strong and not let other peoples behaviour affect u???

Long story short, today was supposed to be a nice day for me, but spending time with my family has just touched nerves of my painful childhood.... Comments, and other peoples behaviours affect me way to much.... My ex also tried to spoil my day wen seeing our boy this morning, but ive managed to stay strong and not react to him.

I understand today was going to be a very difficult day and it has been but does anyone have any tips on not letting other people get 2 u... Ive ended up coming home tonight and just sat here and cried im 2 sensitive i need to get tough but i dont no where to even begin? Xxxx