My boyfriend and I - of three years being together - just broke up yesterday.

And I'm needing advice on how to get through because this is my first ever longest relationship and most serious, since last summer had moved in together.

I feel completely hopeless on finding someone else, I feel as I'm not good enough and deserving to be with someone, I feel extremely lonely and as empty as I've ever been.

Everything has been up and down and completely complicated, but to try and sum it up overall; he wants to focus on himself and be an adult not relying on someone else and to take on his own responsibilities instead of floating through life, and he's noticed that our connection has faded and he no longer feels the same way as he did before. 

I might be recaping it poorly honestly, but him wanting time to himself is valid, he isn't obligated to continue a relationship if he fully isn't ready to properly provide and focus on it as well.
I'm trying to tell myself this, and that it's okay that he needs time to himself and he can't handle my stress and problems on top of his own struggles. 

Because since moving out together, I have broken down a bunch....just had episodes, and the last couples they've been bad.
Because I have it so stuck in my head that he could replace me or leave me or that I'm not good enough, or even sometimes feeling unloved and not understanding what I'm doing wrong.
And before, this was overthinking but because of recently it really seems I pushed him over the edge and made it so he can't handle it.

Which isn't fair to him, but it doesn't seem fair to me in my head when I justify it because I just want reassurance when these moments happen.....
This last fight started because I expressed that I felt left out of his new routine and we weren't hanging out it going on dates or being romantic and intimate at all.....

And now it's spiraling to breaking up, him moving out, and what feels like my worst fears coming true; being abandoned by my love, the person I genuinely wanted to marry.
All those overthinking thoughts and feelings in a weird twisted way, being true. 

And I feel not good enough, because I can't make up for it. I can work on myself and move forward, and we can stay friends because we both want that, but it feels extremely hopeless because I'm alone.

I don't quite now how to move forward.
I keep wanting to break down and "not be here anymore", to wanting to go back to begging him to come back, to wanting to scream at him, to just wanting to try and stay calm and hope things will be ok while I feel the panic on the inside.

I don't have any friends in this new town, just my job and coworkers. He really was the only person I had as a support person, which was a downfall, but I'm utterly by myself and I don't understand how people can do this and carry on. 

I know it's only been two days, but it's agonizing.

How do I go about pushing forward? 

((I'm so sorry about this ramble, I've just never posted in here and don't know how to properly paint this picture))