Just another relationship I ruined

So I recently broke up with someone, because I felt like I was just being a burden, and that I needed a break. They agreed(the first part) said I was dragging them down. And I think I was, I shared too much. I tried to get better, but I couldn't. They couldn't help me, even though they tried, I was grateful for that.

They said they still wanted to be friends, but I said I didn't think that was a good idea because of the possibly toxic emotional connection I have with this person. And also. I'm still in love with them yeah.....

The worst part is how much it hurts. Even though I knew it would happen eventually.I was stupid for starting the relationship, I knew she was going to leave in January anyways,.. I thought by breaking up with them I could finally figure out myself, but I've just made myself worse.

And I'm lonely, but like I have friends, I was so happy, I hadn't been happy in a long time. Now I just feel empty

(sorry for wasting your time)

I just need some advice on how to deal with this.