Should I end it?

Me and this guy, have been on and off for 9 months, almost 10. And, I really liked him at first but my feelings dropped. I don't really love him anymore. We have no fun anymore, and can't hold a conversation without fighting. But, everything was going well. When he told me he hacked my mibba and read everything I've ever written. He promised me he wouldn't go on it, and that he swore on my life he'd never lie to me again.

I think he broke the promise and lied, basically. I think I should dump him but I don't know how to considering it's been so long since I've been without him. He promised he'd never do it again.

I just don't want to be used. I need someone to help me.