Hurt's So Much

My boyfriend broke up with me just over a week ago now. We had been together for about 3 years and 4 months. We had a great time together and he was my best friend. We had little arguments like most couples but nothing major. We was faithful to each other and loved each other greatly. A week prior to our break up we hit a dry patch in conversation and he's decided that this is an OK reason to break up with me. Feels like the 'Spark' isn't there anymore, feels like there isn't much to talk about, has no interest in anything that I say anymore... It came as a HUGE shock because we had a great xmas. Spent loads on each other, he spoilt me on my birthday which was a month laster and then got ME a valentines day card (were not big celebrators of this so was a really nice surprise). Then all of a sudden i get the conversation that has just literally shattered my world to pieces. I can't process this information. I don't understand where this came from. it's so sudden and my heart is just dying. i have so many questions and feel so confused. I'm numb but in pain all at the same time. I don't know what to do with myself. I want to text and ring him every second and tell him he's made a mistake. Why won't he give us a chance to re-ignite this 'spark'. I just wasn't ready for this and obviously wasn't ready to be apart from him. I miss him so so much and i can't even imagine how hard this will be in a few months time. I'm afraid i'm going to buckle under this weight in my heart. How do you let something so amazing go so quickly? I really need to let go because i'm not used to feeling like this.
He's made it clear we have no future.