How can I decide if I should stay or go? He is set in his ways.?

I have been with my boyfriend for over a year. I am in my late twenties, he in his early forties. He is educated and highly intelligent, but other than that he is kind of dull and uninteresting. Our life is amazing, we don't fight often but when we do I feel like I have no voice, that I am not allowed to say how I feel. I am not exaggerating when I say it is always about him. The sad thing is that I love him beyond anything I can describe. The love for him that I have has made me into a person I don't want to be. I feel lonely but I am not alone, you know? (He has many great qualities and I don't mean to be cruel at all.) On top of all this, he has been increasingly dishonest and distant. Ugh, what do I do??? Am I being a pathetic woman or what?