how often do you tell your bf when you are sad and need support?

my boyfriend has autism and we do not live together bc he lives with his family. I am going through verbal abuse, a chronic illness that makes me nauseous for , and now depression. the depression and sickness is getting to me and is now affecting my work where I feel so overwhelmed. how often should I tell my bf I am sad and need support? I feel like I've been needing it almost every other day and do not want to make him feel drained