I think my boyfriend has fallen out of love with me after his brother passed away

I'll try and keep this short. I'm 23 and he's 24. I feel so depressed, and I'm at my wit's end. We've been together for 17 months. His 20 year old brother died 7 months ago. Since then I've tried my best to be there for him, but we're falling apart. He's extremely distant with me, and only warm with me in real life (we're in a long distance relationship). I KNOW it's hard for him, but I cannot take this relationship anymore. He doesn't care about my interests anymore. We barely talk in the evenings. He doesn't ever say "I love you". He doesn't show me warmth, and dismisses any issues I have as "stupid". When I try talking about us, he goes really quiet, instead of showing any interest in the relationship. He admitted he doesn't feel as strongly about me anymore. But when I suggested breaking up a few weeks ago, he was against the idea. I got a long text from him saying that he merely exists every day, that he goes from day to day not knowing where he's heading. From that I realise he might actually be depressed, but when I tried to talk to him about it, he got angry and said "I'm not depressed, because I still do things." And he does. He has a great job and goes out a lot with his friends. So whether he's fallen out of love with me or he's opposed to a relationship with me because he's grieving, I don't know. Either way, I'm tired of being the one who cares and tries to work on things. Last night I had a bit of a falling out with my best female friend. My boyfriend told me to ring him the next morning to talk about it, which I did, but he sounded so uninterested and annoyed at me. The sad thing is, I didn't even expect him to be nice to me, or offer a word of support. I know me falling out with a friend is utterly petty to him right now, but why would he offer to chat about it? I know he might not be ready for a girlfriend now and doesn't want to admit it. I also don't blame him for feeling empty. But I wish he'd recognise he needs help/needs space, instead of making me feel bad all the time. This indifference is killing me.

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