How to make a breakup conversation?

I have a 9 month relationship. But he doesn't seem as interested as me anymore. We only talk 5 to 10 minutes a day. We never get together as the old times. I always loved him as the time I first met him. But he looks like he is bored. We almost never talk. But he never said that he wants to breakup. So I want to make a conversation to him bc I can't keep a relationship like this. But I don't know how to do this. Please help, What should I tell him without breaking his heart?
How to make a breakup conversation?
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