You may in time feel better... you do deserve to feel happy and secure in a relationship and it doesn't sound like he was giving you these things.

It's just been a short while, and you're probably still in shock? Please give yourself time to grieve the loss of a relationship, don't beat yourself up at all over this.. In the coming weeks, please reach out to friends, talk it over, spoil yourself with anything at all that you like to do that will give you a little lift. Just be kind to yourself. You will learn to love again..
Hugs.