Nearly cut today... Feeling so down...

Hey, guys. I know it's stupid, but I nearly tried to cut myself today; things are getting really heavy for me, and I'm struggling to cope. It's been three months since the last time I cut, but I nearly had to start all over today. My boyfriend and a couple of friends I have are my only support, and it's not really working.
I tried to get my boyfriend to leave me because I didn't want him to see me so upset again, but he refused and said he loves me so much, but I had to promise not to ever cut again... I don't know if I can do it. I don't know if I'll stay stable...
Everything I am is split into two right now, and I don't know how to replace it as a whole. Nothing I ever do seems to work, so, what do you guys suggest?

End