You shouldn’t define yourself in this way. I am nice to people, not a nice guy. I am not always nice, but I do try to care about others and help them out.
You need to love all of yourself, not just the nice parts. I love the part of me that can be mean and vindictive, that part of myself served me well when I needed it. I am nice 95% of the time and not so nice the other 5%. Perhaps 1% of the time I can be fairly mean. Every time I find myself being mean, I analyze the situation to try to find out how I might be nicer the next time.
I’m not a finished project, I’m a work in progress. I wouldn’t want it any other way, perfection is death.