Still struggling

I'm new to this, so not really sure how to do it. My boyfriend broke up with me at the start of February. I am not coping well at all. It just came out of nowhere. We were fine, had little arguments, but never anything serious. He dumped me over the phone in the middle of the night. I don't feel like I've had (or will get) closure. It was such a shock and every single day I struggle to hold it together and it break down in tears. I feel numb with the pain of it. My chest aches and I don't know what to do.