Anxiety from breakup

Girls my partner and I of two years split over the weekend and I am so broken.

My anxiety is super bad right now thinking about it.

I know myself that this is for the best and it would be too hard down the track as he already has kids and his ex is a crazy bitch and just some other things.

Anyway I dont know what to do. I miss talking to him and hearing about his day. I miss him.

I am so sad And its making me feel really anxious 😩😩😩

What do I do