My boyfriend committed very unexpectedly

I’m a twenty year old girl and about a week ago my boyfriend committed suicide and my life fell apart. We were planning on moving in together next year and were always talking about our future together. A couple days ago I found out trough a mutual friend that he had been struggling with suicidal thoughts for a while. Our relationship apparently kept them away for awhile but obviously didn’t fix them. He never talked to me about this and always seemed so happy to me. He had moments of anxiety and I urged him to seek help but he always refused and ended the conversation. The funereal is tomorrow and I’m so scared. I have a good support system and am very close with his parents but thinking about the future sends me crashing every time. Any tips on how to feel a little better would be nice.