I Am My Own Worst Enemy

Sometimes I really regret the things that I have done and I get in odd moods, then that mood passes and I feel I could do it all again, try it one more time but my feeling are always battling each other and i really feel as if I have a good me and a bad me sitting on my shoulders and yelling in my ears and I wish i could just end them but I feel if I did that it would end me. Its a cycle that just keeps me on a roller coaster and I never know when the drops will come