Should I just break up with him now?

i was with someone for 2 years who i now belive was a sociopath he grabbed a cat and tride to flush it down a toilet , he got a pair of garbage pickers and squized the cat and dragged it into the house , he also made up huge lies about his life what branch of the service he was in where he was born who his mother was his ethnicity his general wherabouts. he did not mind if he hurt my fellings and used me untill i woke up and left him it was the best decision of my life he put me into a huge depression and almost sucked the life out of me when i finnaly left it was pure joy happiness and freedom ! If you stay it will only get worse im sure it will be hard but you will eventually be happier all on your own i am now with someone whos not perfect but very loving and cant belive i could have missed out on that its like night and day . rember that sociopaths are unable to love you dont deserve that it might take awhile to leave but keep trying