I've been there, its hard, its painful, it hurts & everyone will tell you more or less the same, you won't believe it, you'll think you can;t do it, you'll think it'll never heal then you'll find out later in time that it actually does.
This doesn't mean you stop loving them, it just means you can keep these emotions lower down inside you & in fact you learn to deal with it more, thats what happens, you learn the hard way simply because you have no other choice.
Concentrate on healing, concentrate on your career or other things you want to do in life, realise too that you are ok being single, and just totally be yourself, theirs no rush to get things back to normal & heal, this will happen all in good time.
Whenever you go through a hard time too, just take a deep breath and think about why it ended, and the reason it ended, because thats the point your at now, ya know, in the future you may get back together, you may not, who knows?, but one thisng is DON'T concentrate on that & hold on to that, move forward, don't initiate contact either at all, she knows where you are & she probably needs time to miss you too, your always there, you will never get out of this situation you are in now & that is 110% definite !
But for now, take thigns steady, do things when your ready to, yes, go out more, do more things to take your mind off things, you'll see in time that things are actually getting better & you will get through this.
Just think to yourself "Ya know what I'm gonna be ok" ... because you will be.
Good luck.