How to help

My boyfriend of three years recently lost his brother. He got shot and passed. My boyfriend is very depressed and he keeps telling me that things will bother him like how he can’t provide to our relationship like he used to. He says “I don’t have the emotional capacity to deal with things”. He doesn’t want a break and his family is close. Therapist isn’t an option. How can I help him with his grieving and getting through this?