The thoughts & urges are back :(

Things have been up and down lately. Though things were so much better when I last posted here, these days things haven't been so great. The thoughts and voices in my head are back. That voice that tells me I'm not good enough, that I'm worthless, that I'm alone. It's all back and it hurts. With all these back, the urge to cut is back as well and it's really fucking strong. I was really close to cutting again yesterday. I didn't but I really wanted to. 
The problem is I don't know why it's all back. Things have been going well in general... My family came to visit last month, it was stressful but it was also great, and I didn't feel like this. When they left I was fine with it, actually kind of relieved that I had my freedom back and all that. I've also been seeing someone for a little over a month now, he's cute and sweet. So things are going okay, yet I feel this pain inside of me for some reason. It's driving me insane that all these feelings and thoughts rushed back so suddenly.
It took so much out of me yesterday to stop myself from cutting and I don't know how long I can keep fighting it, it just hurts even more knowing that I keep fighting this battle on my own.