Hi ken, this is a uniquely written piece as I've never read one quite like it. Your rhyming makes it much smoother to read.
I think we all often ask ourselves this questions many times in our lives and never quite know the answer.
Great poem, nice rhyme and rhythm. I like the way you explained yourself, your personality through your relationship with another, what you are to them. Although you question your relationship, your personality is clear.
BTW, you have a grammar mistake, first stanza, second line... it's "you're" not "your" (Why am I angry and you're** filled with glee?)