Feeling guilty for not being able to get pregnant...:(

I live in Burma (Myanmar) and here it seems that conceving is the easiest thing in the world. Every family is a BIG family and by big I mean between 5 to 10 children. It seems like everytime women have sex here they get pregnant and it is hell for me as i am struggling to get pregnant even thou i am 23 years old and have a fair overall health...i cant help myself from feeling guilty towards my boyfriend for not being able to give him a child yet and sometimes he is not helping either. A few days ago ( when af showed up) i made a joke about my bloated stomach and told him "look we have baby!!" and he answered "no u cant have baby" ...i felt terrible...i dont know what to do and how to feel anymore....