Will it get better

I broke up with my bf of nearly 6 years 4 days ago. I’ve cried every day since. It was an amicable breakup where neither of us did anything explicitly wrong or bad, it had just come to the point where I was expecting a lot of change and nothing would change really. So it wasn’t a hostile break up and I still love him so much but it wasn’t working. I wake up missing him, I go to bed yearning for his arms around me. When I’m doing things all I can think about is him and how he would react or say. I want to text him telling him about my day but I can’t. It also doesn’t seem quite real, it feels like a bad dream where in a couple of days we’ll be back to how we were, doing our weekly routines, as if nothing happened. A part of me wants that, then I remember why we broke up in the first place and I’m upset again. It’s like I’m in grieving, i’m grieving the love of my life as well as my best friend, all the while he’s still alive and just down the road. I’m scared that in a few years time I’ll look back and have regrets not staying with him. I’m scared that I’ve just lost the greatest and biggest love that I will ever have. I don’t know how I can actually go on like this, surely it gets easier, surely it gets better? Does it? If anyone has or is going through a similar situation to me, please help.