"Love your neighbor as yourself" is a command that assumes love of self. Paul the Apostle tells us that in point of fact, each of us loves himself or herself (Ephesians 5:29). There is an innate sense of self-preservation and self-interest that is not unhealthy, but necessary to life itself.
Those who argue that we are born with an inherent self-hate and need to learn to love ourselves must consider that so-called evidence of self-hate, like self-loathing, is proof of self-love. People who say, "I'm fat and ugly. I hate myself" are not revealing self-hate as much as they are revealing self-love. It is love for one's self, not hate, which causes one to be disappointed with one's appearance.1
That said, in some churches self-deprecation is treated like a virtue. Because humility is a genuine Christian virtue, we assume that dissing ourselves is a way to ensure that we won't become puffed up. Though we sometimes speak ill of ourselves when we are with others, we more often non-verbally flagellate ourselves in private. We take inventory of our errors and berate ourselves over and over. Would we treat others this way? Does this treatment of ourselves help us improve what we hope to improve?
God created you, correct? He called His creation good. He calls you good. He's given you such value that He spent the life of His Son to bring you into relationship with Him. He is not disillusioned with you. Your foibles don't catch Him off guard. There are no deal breakers. You can't possibly ruin your relationship with Him. His love for you is more than you will ever be able to get your mind around. It is not fickle and there is nothing that can separate you from it (See Romans 8:35-39).
So, be nice to yourself. Cut yourself some slack. Ask Him to show you how. Ask Him to show you one thing you can do to show yourself grace today.
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1 TA McMahon and Dave Hunt persuasively argue this point in their book, The Seduction of Christianity. See their chapter on "The Myth of Self Hate."