What do I do

I’m a really depressed person. I’m really good at hiding it but I'm trying to be more open with the people closest to me. I was really struggling last night and my bf asked me what was wrong and I said I wanted to die and he ignored me and started watching YouTube. I went to the bathroom and cried and he stayed in bed watching YouTube. He does this everytime I'm sad or upset. He just ignores me or acts like nothing is wrong. It's like I'm an inconvenience to him. We have a great relationship any other time. He has been the best and healthiest relationship I've been in but he acts like he doesn't care when I'm sad. I don't want to leave bc I love him so much but I don't know what else to do. When we talk abt it he says he does care but does it all over again. I feel like it's never going to get better and I need the support.