Flight attendant Job boyfriend say is unrealastic

Right now I'm umeployed I have decided to apply for a flight attendant Job and I told my boyfriend and he told me is unrealistic I have a apply on a lot of places and he basically gives me a lecture about it how I can not do it and that he doesn't want to talk about it because is baby stuff that no wonder I never get hired now I'm here doubting myself like always what should I do before I forget he acts like me having asthma prevents me from doing normal stuff any advice would be helpful thank you